Page 2: Table Of Contents
Table of Contents 1 About RM500SL..........................6 Section overview..........................6 New in this software release......................6 Electronic user’s guide........................6 Warranty, Trademarks, Acknowledgments..................7 Notices for the European Community.....................7 EC Declaration of Conformity......................9 2 Getting Started..........................11 Section overview..........................11 Unpacking and connecting......................11 CDROM............................11 Microphone connection.........................11 Microphone care..........................12 Battery pill use and care........................13...
Page 3 User's Guide Version 3.4 © June 2011 RM500SL ® Section overview...........................38 ANSI S3.22-1996 facts........................38 ANSI S3.22-2003 facts........................38 ANSI 1996 Linear and AGC tests....................39 ANSI 2003 Linear and AGC tests....................39 ANSI test results..........................40 ANSI input-output curves......................40 ANSI telecoil terminology......................41 ANSI telephone simulator (TMFS) test..................41 Telecoil test results........................42...
Page 4 User's Guide Version 3.4 © June 2011 RM500SL ® Section overview...........................69 Insertion gain in SPL........................69 Insertion gain in HL........................70 Audiometric data entry........................70 REUR measurement procedure.....................71 REAR measurement procedure.....................72 SII calculation in Insertion gain....................73 17 Speechmap...........................75 Section overview..........................75 Speechmap facts..........................75 DSL 5.0 in Speechmap........................75 DSL 5.0 changes..........................76...
Page 5 User's Guide Version 3.4 © June 2011 RM500SL ® 23 References..........................108 24 Appendix 1..........................111 Manufacturer Disclosure Statement for Medical Device Security..........111 25 Appendix 2..........................114 AudioNote 2.1 VERIFIT and RM500SL Test Signals and Analysis..........114...
Page 6: About Rm500Sl
9. MPO test signal modified to make the results more directly comparable to UCL measurements or estimates, independent of the hearing aid characteristics. 10. RM500SL software can be updated from website without the use of a CD. Please consult the relevant section of this User’s Guide or Help for more details.
Page 7: Warranty, Trademarks, Acknowledgments
Warranty: The RM500SL is warranted against defects for two years from date of purchase. Within this period, it will be repaired without charge for parts, labor or return shipping when returned prepaid to your authorized Audioscan service agent. This warranty does not apply to battery substitutes (pills), which carry a 90 day warranty, or to equipment that, in our sole judgment, has been subject to misuse, or unauthorized alteration or repair.
Page 8 Medical electrical equipment needs special precautions regarding EMC and needs to be installed and put into service according to the following information: The RM500SL should not be used adjacent to or stacked on other equipment. If this is • necessary, its operation should be verified as normal in this configuration.
Page 11: Getting Started
RM500SL and must be ordered separately. Unpacking and connecting 1. Carefully unpack the RM500SL and check the contents of the shipping box against the enclosed packing list. Note that some parts may be packed inside the test chamber. 2. Unwrap the power cord from its stowage hooks - noting carefully how it has been packed.
Page 12: Microphone Care
2. Plug the probe microphone assembly into the probe connector located at the left of the test chamber as shown. NOTE: A microphone extension cable (VA-130) is available from Audioscan. Standard audio extension cables should not be used. They will substantially increase noise levels.
Page 13: Battery Pill Use And Care
2. Insert the pill into the hearing instrument, carefully closing the battery door over the thin connecting strip. 3. Plug the pill’s cable into the battery pill jack inside the RM500SL Test box. (to the left of the coupler microphone connection).
Page 14: External Peripherals
RM500SL ® The RM500SL may be operated from the built-in keypad, a USB mouse (not included) or a standard USB computer (QWERTY) keyboard (not included), which may also be used to enter headers and comments on printouts: See Input device operation.
Page 15 User's Guide Version 3.4 © June 2011 RM500SL ® Auxiliary audio output jacks are not active with this version of software. In the European Community, if this device is connected to one or more other devices to make a system, the CE mark on this device is only valid if the other devices in...
Page 16: General Operation
Grason-Stadler products, may be scanned into the RM500SL. Input device operation The RM500SL may be operated by means of the built-in keypad, an external mouse or an external QWERTY keyboard. These devices are used to summon on-screen menus and select items from them, to operate on-screen buttons and to input data.
Page 17: Keypad Keys
RM500SL ® In Speechmap and Insertion gain tests, audiometric data in barcode form on a RM500SL or Verifit printout may be entered by scanning the appropriate barcode. In Speechmap, threshold, UCL, RECD, transducer, age and ABR nHL to eHL conversion factors are encoded.
Page 18: Menus, Lists And Buttons
User's Guide Version 3.4 © June 2011 RM500SL ® <Tests> Summon Test Selection Menu containing a list of the available test procedures. <Session Summon Session Data Menu to erase > or export data <Left/Rig Used to alternate between ears or A/B ht>...
Page 19: Screen Messages And Help
This requires that the USB flash drive be removed from the RM500SL and plugged into the USB port on a PC. To remove the USB flash drive, ensure that the RM500SL power is off and: 1. Open the test chamber and remove the foam from the test chamber floor.
Page 20 2. Gently insert the USB flash drive into the USB port, with its foam pad down. 3. Replace the foam in the floor of the test chamber. NOTE that the USB flash drive has been especially configured for the RM500SL. Replacing this flash drive with another can cause erratic operation. Such replacement should be done...
Page 21: General Setup
User's Guide Version 3.4 © June 2011 RM500SL ® 4 General Setup Section overview This section covers Date and time setup, Display settings and Saving test setup. Date and time setup To set the date and time that appears on printouts and calibration screens: 1.
Page 22 User's Guide Version 3.4 © June 2011 RM500SL ® To enable/disable erasing of test levels, stimuli and assessment parameters when Erase data is selected: 1. Press <Setup>, then highlight and <PICK> [Save option] 2. Highlight and <PICK> [Save test setups on erase data to toggle between Yes and No.
Page 23: Networking
PC. Images and underlying data may also be saved to a shared folder on a networked PC. See Printing and Storing Results for details. The RM500SL may also be connected to a single computer using a network hub. Networking requirements The RM500SL may be connected to a Windows network by connecting to the rear connector panel using a Cat 5, RJ-45 cable.
Page 24: Single Computer Connection
® network administrator, from the drop-down lists. 5. Highlight and <PICK> [Test connection]. The RM500SL will prompt you for an IP address of a computer or router on your network. In a single PC-to-RM500SL network, this is the IP address of the PC you are connecting to.
Page 25: Printing And Storing Results
USB memory stick or in a Windows-shared folder on a networked PC for further analysis or to be restored to a Verifit or RM500SL for future use. NOTE: If a header, comment, or client ID field, or file name, identifies the printed or saved data as belonging to an individual, it becomes Individually Identifiable Health Information and must be protected under the HIPAA Security Rule.
Page 26: Barcodes, Tabular Data, Headers And Comments On Printouts
User's Guide Version 3.4 © June 2011 RM500SL ® 8. Place the roll in the paper tray and advance another 10” (25 cm) of paper. 9. Lower the printer head using the small black lever. Press <Continue> to print or <Cancel>...
Page 27: Local Printer Setup
User's Guide Version 3.4 © June 2011 RM500SL ® Individually Identifiable Health Information which must be protected under the HIPAA Security Rule. 1. Connect a computer keyboard to the rear connector panel. 2. Press <Setup>, then highlight and <PICK> [Printing].
Page 28: Printing To Usb Memory
Highlight and <PICK> [Store session to file] and press <Continue>. A style sheet (audioscan.xsl) which allows the stored xml file to be viewed with a web browser or Excel (right click and select Open with Excel) is automatically saved with the data file.
Page 29: Printing To A Network File
User's Guide Version 3.4 © June 2011 RM500SL ® supported. In Windows2003 Server you must add permission to allow Anonymous Logon to print to the shared printer. 1. Press <Setup>, then highlight and <PICK> [Printing]. 2. Highlight & <PICK> [Other network printer] or [Windows shared printer].
Page 30: Storing And Restoring Data - Setup
[Erase data] choices or the power is turned off. (Setup data will be retained even after the power is turned off.) The RM500SL database may be stored and restored via xml files on a USB drive or a networked PC share. If the data exchange location is a network share, you must first enable networking.
Page 31 6. Highlight and <PICK> a session and press <Continue>. A style sheet (audioscan.xsl) which allows the stored xml file to be viewed with a web browser or Excel (right click and select Open with Excel) is automatically saved with the...
Page 32: Test Box Measures - Setup
User's Guide Version 3.4 © June 2011 RM500SL ® 7 Test Box Measures - Setup Section overview For most tests, two completely separate sets of test results, labelled A and B, may be retained and displayed. The appearance of Test box measures screens may be changed in several ways.
Page 33: 1996 Or 2003 Ansi Standard
User's Guide Version 3.4 © June 2011 RM500SL ® 3. Where available, you may also highlight and <PICK> the envelope to toggle it on or off. 4. Press <Continue> to return to the test screen. 1996 or 2003 ANSI standard Automated tests of linear and AGC hearing aids may be conducted according to either the ANSI S-3.22-1996 or ANSI S3.22-2003 test standards.
Page 34: Test Box Calibration Facts
User's Guide Version 3.4 © June 2011 RM500SL ® Test box calibration facts Test box microphone calibration establishes a correction curve for the uncalibrated test box reference microphone by comparison with the factory calibrated coupler microphone. It may be performed as often as desired but will be invalidated at 1 am the following day or at 1 am the following Monday, depending on the choice of Daily or Weekly calibration interval.
Page 35: Calibration Check For Coupler Microphone
User's Guide Version 3.4 © June 2011 RM500SL ® Calibration check for coupler microphone Accuracy of test box measurements depends on the calibration of the coupler microphone. This should be checked regularly using a microphone calibrator with an adapter ring. The RE780 (1 1/8”) and RE781 (1”) rings are designed for Quest CA22 and QC-10/20...
Page 36: Coupling The Hearing Instrument
User's Guide Version 3.4 © June 2011 RM500SL ® Coupling the hearing instrument The Verifit is supplied with 2 metal couplers, a type HA-1 (ITE) and a type HA-2 (BTE). Note that an ANSI standard coupler for CICs does not exist. These must be tested in the HA-1 coupler.
Page 38: Ansi S3.22 Hearing Aid Tests
AGC aids that have a HFA (or SPA) full-on gain greater than the HFA (or SPA) OSPL90 minus 77 dB. Otherwise the RTP is full on. If required, the RM500SL will pause in its testing and guide you in setting the gain control to the RTP.
Page 39: Ansi 1996 Linear And Agc Tests
User's Guide Version 3.4 © June 2011 RM500SL ® measuring attack and release time. Full-on gain is determined with 50 dB input SPL (60 dB was formerly an option) and frequency response curves are run at 60 dB SPL for Linear and AGC aids.
Page 40: Ansi Test Results
Press <Continue> to resume the test. During the AGC test, the RM500SL will pause to request that AGC controls or programmable parameters be set for maximum AGC effect. If the manufacturer does not provide settings to produce maximum AGC effect, use settings that result in the highest gain for soft sounds and the lowest gain for loud sounds.
Page 41: Ansi Telecoil Terminology
250 and 500 Hz). Ensure that the test box is well sealed and ambient noise is low. ANSI telecoil terminology The RM500SL test chamber contains an integrated telephone magnetic field simulator (TMFS) meeting the requirements of ANSI S3.22, that enable the measurement of coupler SPL produced by a hearing instrument with a telephone pickup coil.
Page 42: Telecoil Test Results
User's Guide Version 3.4 © June 2011 RM500SL ® (1996) or RSETS (2003). The easiest way to meet both requirements is to run a [Linear] or [AGC] test before running this test. See ANSI 1996 Linear and AGC tests; ANSI 2003 Linear and AGC tests 1.
Page 44: Other Test Box Measures
® 9 Other Test Box Measures Section overview In addition to the tests of ANSI S3.22, the RM500SL provides the following: Noise Reduction: This test shows the amount of noise reduction provided by the hearing instrument. Distortion: Harmonic distortion at 2nd or 3rd harmonics and 2nd plus 3rd with input levels varying from 60 –...
Page 45: Multicurve Procedure
User's Guide Version 3.4 © June 2011 RM500SL ® 1. Press <Tests>, then highlight and <PICK> [Test box measures], then highlight and pick [Noise reduction]. 2. Highlight and <PICK> Test 1, 2 or 3. 3. Highlight and <PICK> a stimulus type from the list box.
Page 46: Spectral Analysis In Multicurve
User's Guide Version 3.4 © June 2011 RM500SL ® 4. See Test Box Measures - Setup to change screen appearance. Spectral analysis in Multicurve Selecting a stimulus level of 0 dB (off) in [Multicurve] presents a spectral analysis of the coupler microphone signal (Scale = dB SPL) or the difference between the coupler and reference microphone spectra (Scale = dB Gain).
Page 47: Manual Control Procedure
User's Guide Version 3.4 © June 2011 RM500SL ® Manual control procedure Manual control displays the reference microphone SPL, the coupler microphone SPL, their difference in dB (gain) and coupler microphone signal distortion at any selected 1/12th octave frequency and at a selected input level from 40 to 90 dB (in 5 dB steps) and at 0 dB (off).
Page 48 User's Guide Version 3.4 © June 2011 RM500SL ® microphone may be analyzed by 1/12th octave, A-weighted or C-weighted filters. A and C- weighted measurements are limited to frequencies above 100 Hz and the averaging time and update rate are 384 ms.
Page 49 User's Guide Version 3.4 © June 2011 RM500SL ® NOTE: A microphone extension cable (VA-130) is available from Audioscan. Standard audio extension cables should not be used. They will substantially increase noise levels.
Page 50: Sensory Loss Simulator
User's Guide Version 3.4 © June 2011 RM500SL ® 10 Sensory loss simulator Sensory loss simulator description A pure conductive loss attenuates loud and soft sounds equally, and is easily simulated by just turning down the volume or inserting an earplug. Losses of a sensory nature are more complex and more difficult to simulate.
Page 52: On-Ear Measures - Setup
User's Guide Version 3.4 © June 2011 RM500SL ® 11 On-Ear Measures - Setup Section overview For accurate, repeatable measurements, the Verifit must be properly set up and calibrated, the client must be properly positioned and the probe tube must be properly positioned in the ear canal.
Page 53: Calibration Check For Probe Module
User's Guide Version 3.4 © June 2011 RM500SL ® 3. Position the open end of the probe tube in front of the reference microphone inlet and press it between the posts as shown. 4. Hold the probe module 12.5 - 15 cm (5 – 6 inches) away from and directly in front of the sound-field loudspeakers.
Page 54: Max Tm Spl Setup
User's Guide Version 3.4 © June 2011 RM500SL ® <PICK> [Manual control]. 2. Highlight & <PICK> [Level], then highlight & <PICK> 70 from the drop-down list. 3. Highlight and <PICK> [Frequency], then highlight and <PICK> 2000 Hz from the drop- down list.
Page 55: Abr Nhl To Ehl Setup
This Max TM SPL setting will be in effect until you change it. If the limit is exceeded during an on-ear test, the RM500SL will terminate the test and display the message “MAX TM SPL EXCEEDED”. You must then decide to either reduce the maximum output limit of the hearing instrument or increase the Max TM SPL setting following the steps above.
Page 56: Positioning The Probe Tube
User's Guide Version 3.4 © June 2011 RM500SL ® measurements. Room noise can increase test time, cause errors and alter the operation of the hearing instrument being evaluated. 1. Choose a quiet location and position the client and the sound-field speakers at least 1.5 m (5 feet) away from any hard surfaces.
Page 58: On-Ear Measures Screen Setup
On-ear right or left display The RM500SL can retain and display On-ear test results for two ears. To switch between left and right test results, press the <Left/Right> key. Graph, table or 2cc target format Most on-ear test screens may be viewed in graphic or tabular format.
Page 59: Hide Or Show On-Ear Curves
User's Guide Version 3.4 © June 2011 RM500SL ® Speechmap tests view the hearing aid as increasing the ear canal SPL. Speech gets louder but the threshold remains fixed. On the HL scale in Speechmap, normal ear canal threshold becomes the 0 dB HL line and all data is replotted using this reference. A physical interpretation of the data is difficult and the use of HL in Speechmap is not recommended.
Page 60: On-Ear Instrument Measures
User's Guide Version 3.4 © June 2011 RM500SL ® 13 On-Ear Instrument Measures Section overview A number of the tests covered in Test box measures can also be performed with the hearing instrument coupled to the ear of a client rather than to a 2cc coupler. The on-ear results may be expected to differ from the test box results because of the different acoustic environment and the different acoustic load.
Page 61: On-Ear Manual Control
User's Guide Version 3.4 © June 2011 RM500SL ® 5. Highlight and <PICK> [Start test] 6. Highlight and <PICK> [Continue] to capture the comparison curve once the noise reduction function has responded. On-ear manual control 1. Refer to On-Ear Measures - Setup to prepare the system for use and for proper positioning of the client and the probe tube.
Page 62: Sound Level Meter Using On-Ear Microphones
Frequency without stopping the test. Sound level meter using on-ear microphones The manual control feature enables the RM500SL to be used as a sound level meter to perform C-weighted, A-weighted or 1/12th octave analysis of sound as measured by the probe and reference microphones.
Page 63: Occlusion Effect Test
User's Guide Version 3.4 © June 2011 RM500SL ® 14 Occlusion Effect Test Section overview The occlusion effect refers to the unnatural sound of one’s own voice that results from occluding the external ear. It is the result of the high SPL produced at the back of the throat during a closed vowel utterance coupling to the closed ear canal via bone conduction.
Page 65: Recd (Real-Ear To Coupler Difference)
User's Guide Version 3.4 © June 2011 RM500SL ® 15 RECD (real-ear to coupler difference) Section overview The RECD measurement procedure may be accessed by selecting RECD from the On-ear tests list or from the Audiometry poster within Speechmap. RECD facts Individual RECD values are derived by comparing the real-ear SPL for a given test signal to the 2cc coupler SPL for the same test signal.
Page 66: Recd On-Ear Response
User's Guide Version 3.4 © June 2011 RM500SL ® 2. If a valid coupler response exists, go to RECD on-ear response. 3. If no coupler response exists or the measurement interval has been exceeded, connect the RECD transducer to the BTE coupler.
Page 67 User's Guide Version 3.4 © June 2011 RM500SL ® 1. Press <Tests> then highlight and <PICK> [On-ear measures], then highlight and <PICK> [RECD]. 2. If no coupler response exists or the measurement interval has been exceeded, go to 15.3: RECD coupler responseIf a valid coupler response exists, highlight and <PICK>...
Page 68: Recd Results
User's Guide Version 3.4 © June 2011 RM500SL ® (cyan). If the RECD curve is negative and unstable in the low frequencies, check the seal of the foam tip. Increase the tip size and/or apply a lubricant to the foam tip to improve the seal.
Page 69: Insertion Gain
User's Guide Version 3.4 © June 2011 RM500SL ® 16 Insertion Gain Section overview Insertion gain is the difference between aided and unaided ear canal SPL (REIG = REAG - REUG). It inherently assumes a sound-field audiogram. For non-linear hearing aids, REIG is stimulus-dependent and the dependency is specific to each hearing aid.
Page 70: Insertion Gain In Hl
Threshold data and parameters may be entered by scanning a barcode on a previous Verifit or RM500SL printout or manually using a mouse, the keypad or the numeric keypad on an external keyboard. See Mouse, keyboard, barcode scanner, and Input device operation.
Page 71: Reur Measurement Procedure
User's Guide Version 3.4 © June 2011 RM500SL ® 1. Press the barcode trigger and center the red line on the barcode from a distance of 6 - 8”. The scanner will beep and the Barcode Entry poster opens. 2. Highlight and <PICK> [Done] to accept the data indicated on the poster.
Page 72: Rear Measurement Procedure
User's Guide Version 3.4 © June 2011 RM500SL ® entry poster. You may enter threshold data at this time (see Audiometric data entry) or press <Continue> to proceed with the measurement. 4. Highlight and <PICK> REUR (below REAR/REIG test 3).
Page 73: Sii Calculation In Insertion Gain
SII calculation in Insertion gain The RM500SL calculates a Speech Intelligibility Index (SII) value for unaided speech at 70 dB SPL (REUR), the target REIG and for each aided test. The calculations use the 1/3 octave band method of ANSI S3.5 –1997 without the 160 Hz band and without masking effects...
Page 75: Speechmap
1. DSL 5.0 uses RECD values for ages > 119 months from a different source than for ages ≤ 119 months; Audioscan has used the RECD values for a 119 month old for ages > 119 months so all values come from the same study.
Page 76: Dsl 5.0 Changes
5. Broadband output limiting targets are not provided. DSL 5.0 changes The Audioscan version of DSL 5.0 includes provision for bone conduction and ABR threshold, binaural targets, targets for speech levels from 50 to 75 dB SPL, new targets for children, targets for adults and new RECD default values for children (1 month to 10 years) and adults.
Page 77: Using Speechmap
User's Guide Version 3.4 © June 2011 RM500SL ® This is the stated goal of the IHAFF (International Hearing Aid Fitting Forum) fitting method. Camfit equalisation aims to amplify speech to produce the same loudness in each critical band. It has been argued that this is likely to give the highest intelligibility for a given overall loudness.
Page 79: Screen Tour - Aided Screen
User's Guide Version 3.4 © June 2011 RM500SL ® Screen tour - aided screen On-ear or Test box mode The Speechmap environment provides two hearing instrument verification options: On-ear measures and Test box measures. Using on-ear mode, the stimulus is controlled by the on- ear reference microphone below the ear and SPL in the ear canal is measured by the probe microphone.
Page 80: Sii Calculation In Speechmap
SII calculation in Speechmap The RM500SL calculates a Speech Intelligibility Index (SII) value (in %) for unaided speech at 65 dB SPL and for each aided test. The calculations use the 1/3 octave band method of ANSI S3.5 –1997 without the 160 Hz band and without masking effects with results expressed as a % by multiplying by 100.
Page 81: Speechmap Fitting Procedures
Threshold data and parameters may be entered by scanning a barcode on a previous Verifit or RM500SL printout or manually using a mouse, the keypad or the numeric keypad on an external keyboard. See Mouse, keyboard, barcode scanner, and Input device operation.
Page 82: Assessment Data Choices
User's Guide Version 3.4 © June 2011 RM500SL ® keyboard enter HL values on the numeric keypad. 5. Press <Continue> when all points have been entered. 6. Repeat the process for Bone conduction, UCL and RECD if [Enter] has been selected for any.
Page 83: Fitting To Targets For Soft Speech
User's Guide Version 3.4 © June 2011 RM500SL ® will be used. These may be set to DSL values or to values that you have entered in Setup. Note that, in some facilities, nHL is defined in such a way that it is effectively eHL; in these cases, ABR (eHL) should be selected and no conversion factors will be applied.
Page 84: Fitting To Targets For Mid-Level Speech
User's Guide Version 3.4 © June 2011 RM500SL ® RESR targets (NAL-NL1) at all frequencies. Press <Continue> to record the MPO curve. In on-ear mode, advise the client to point to the screen if a sound becomes too loud during the test (see Max TM SPL setup). Press <Continue> to run and record a single sweep.
Page 85: Verifying Frequency Compression/ Frequency-Lowering Hearing Instruments In Speechmap
User's Guide Version 3.4 © June 2011 RM500SL ® the on-ear reference microphone, interfering with the sound-field equalization. For this reason, the hearing instrument must be muted during sound-field equalization. 1. Position the client and probe tube and enter audiometric data. See On-Ear Measures - Setup, Speechmap ®, Speechmap Fitting Procedures.
Page 86 User's Guide Version 3.4 © June 2011 RM500SL ® To test frequency-lowering: 1. From the Speechmap screen, choose either “On-ear” or “Test box” Mode. (Review 17.9: On-ear or Test box Mode.) 2. Program the hearing instrument so that the frequency-lowering feature is inactive.
Page 87: Fm Fitting And Verification
User's Guide Version 3.4 © June 2011 RM500SL ® use one of the Speech-std stimuli to verify aided speech audibility or target match (as described elsewhere in this section) for frequencies below the isolated band. FM fitting and verification FM Offset or FM Transparency method in Speechmap (after Platz 2004) It is assumed that the hearing aid has been set up for optimal audibility and maximum output.
Page 88 User's Guide Version 3.4 © June 2011 RM500SL ® least 12” away from the FM transmitter*. Put FM transmitter microphone, set to Omni, within 2mm of the reference microphone in the test box. 5. With the FM transmitter unmuted, repeat step 2. Note that the hearing aid is outside the test box during this test - Quiet please! The results should be within +/- 2 dB of the results from step 3.
Page 89: Speechmap Technical Details
User's Guide Version 3.4 © June 2011 RM500SL ® 19 Speechmap Technical Details Section overview Speechmap provides a variety of stimuli for the testing of non-linear hearing aids with a range of digital processing features. Additional information regarding the stimuli and their analysis is provided in Appendix 2 of the printable User's Guide.
Page 90: Stimulus Levels
User's Guide Version 3.4 © June 2011 RM500SL ® The overall SPL, 1/3rd octave band SPL, vocal effort and microphone location effects are given in the following tables for the various broad-band signals available. Stimulus levels LTASS for standard speech is from Cox & Moore (1988). Loud spectrum is from ANSI S3.5-1997.
Page 91: Microphone Location Effects
User's Guide Version 3.4 © June 2011 RM500SL ® 52.5 53.7 54.6 56.5 52.8 14.4 10.8 26.4 32.1 1000 51.0 50.0 52.0 52.7 50.4 15.0 10.5 26.4 32.7 1250 50.5 48.0 51.0 45.4 51.3 14.8 22.0 33.6 1600 48.0 47.4 51.1...
Page 92: Speech Signal Analysis
User's Guide Version 3.4 © June 2011 RM500SL ® Microphone location effects are added after the overall rms level has been set Speech signal analysis One of the most-used measures of a speech signal is the long-term average speech spectrum (LTASS). This is a 1/3 octave spectrum averaged over a sufficiently long portion of the speech material to provide a stable curve.
Page 93: Troubleshooting
20 Troubleshooting Section overview This section covers common problems encountered when using the RM500SL. If you require further assistance, note your model and serial number (located next to the power switch) and contact your local distributor, or Audioscan at 519-268-3313 800-265-2093 (USA only), 519-268-3256 (fax) or service@audioscan.com...
Page 94: Test Box Curves Inconsistent
The battery may be close to end of life or starved for air (zinc-air cells) because of a • tight seal on the battery compartment. Try using the RM500SL battery pill. The test box reference microphone (the white one in the sound chamber) is incorrectly •...
Page 95: No Test Box Reference Mic. Detected
User's Guide Version 3.4 © June 2011 RM500SL ® Try running an On-ear test. • No test box reference mic. detected No test box reference mic. detected! This message may be displayed when starting a hearing instrument test. It indicates that the Verifit is not measuring any sound at the test box reference microphone.
Page 96: Sound-Field Speaker Overdriven
2. Print this page on an external printer (see External display, printer, speaker) or from the electronic user’s guide on the Audioscan software CD (see Electronic user’s guide). 3. Scan these two barcodes, starting with the top one. This will reset the scanner to its...
Page 100: Technical Specifications
User's Guide Version 3.4 © June 2011 RM500SL ® 21 Technical Test Stimuli....tone, tone burst,pink noise, ........calibrated or live speech Test stimulus levels.40 to 90 dB SPL in 5 dB steps Specifications Test stimulus levels (inductive)..31.6mA/m per ..........(ANSI S3.22 - 2003) Specifications subject to change without notice Test stimulus distortion...<2% at 90dB SPL...
Page 101: Sensory Loss Simulator
User's Guide Version 3.4 © June 2011 RM500SL ® Freq. modulation..sawtooth ±3% over 128 ms Stimulus levels for tones. 40 - 85 dB SPL in 5 dB steps Test stimulus accuracy at reference mic. for tones (200 - 2000 Hz)........±1.5 dB SPL (2000- 8000 Hz).......±2.5 dB SPL...
Page 103: Glossary
User's Guide Version 3.4 © June 2011 RM500SL ® 22 Glossary AGC, Automatic Gain Control, the means by which gain is automatically controlled by the level of the signal being amplified. (ANSI S3.22) AGC-I, input-controlled AGC (see "input compression"). AGC-O, output controlled AGC (see "output compression").
Page 104 User's Guide Version 3.4 © June 2011 RM500SL ® transmitter and an fm receiver. The microphone and transmitter are worn by the speaker and the receiver is worn by the listener. FOG, full on gain, gain for a 50 dB input SPL with the gain control set to maximum ANSI S3.22)
Page 105 User's Guide Version 3.4 © June 2011 RM500SL ® Loop System, an assistive listening device that uses magnetic induction to carry a signal from a microphone/amplifier to a wire loop. The signal is picked up from the loop by a hearing aid set to the telecoil position or by a receiver with built-in telecoil, volume control, and earpiece.
Page 106 User's Guide Version 3.4 © June 2011 RM500SL ® REDD, Real-Ear-to-Dial Difference, difference, in dB as a function of frequency, between the SPL (or BSPL) measured at the eardrum and the audiometer dial setting that produced it. It is specific to the client, headphone and audiometer used to generate it.
Page 107 User's Guide Version 3.4 © June 2011 RM500SL ® short-term spectra are typically 120 - 130 millisecond averages in 1/3 octaves. The statistical range is typically from the 70th to the 99th percentile. SPL, Sound Pressure Level, rms sound pressure relative to 20 uPa, expressed in decibels.
Page 108: References
Byrne, D. (1977). The speech spectrum - Some aspects of its significance for hearing aid selection and evaluation. British Journal of Audiology, 11,40-46. Cole, W.A. & Sinclair, S.T. (1998). The Audioscan RM500 Speechmap/DSL fitting system. Trends in Amplification, 3(4):125-139. Corliss, E. L. R. (1990) The ear as a mechanism of communication. Journal of Audio Engineering Society, 38(9):640-652.
Page 109 User's Guide Version 3.4 © June 2011 RM500SL ® Hawkins, D.B., Walden, B.E., Montgomery, A.A., & Prosek, R.A., (1987). Description and validation of an LDL procedure designed to select SSPL90. Ear and Hearing ,8:162-169. Killion, M. C., & Monser, E. L. (1980). "Corfig: Coupler response for flat insertion gain." In G.
Page 110 User's Guide Version 3.4 © June 2011 RM500SL ® Orlando: Grune & Stratton. Seewald, R.C., Ross, M. & Spiro, M.K. (1985). Selecting amplification characteristics for young hearing-impaired children. Ear and Hearing, 6(1), 48-53. Seewald, R.C., Ross, M. & Stelmachowicz, P.G. (1987). Selecting and verifying hearing aid performance characteristics for young children.
Page 111: Appendix 1
User's Guide Version 3.4 © June 2011 RM500SL ® 24 Appendix 1 Manufacturer Disclosure Statement for Medical Device Security...
Page 114: Appendix 2
User's Guide Version 3.4 © June 2011 RM500SL ® 25 Appendix 2 AudioNote 2.1 VERIFIT and RM500SL Test Signals and Analysis For additional details of the signals and their analysis, see the appended AudioNote.
Page 115 Bill Cole BASc, PEng 1 Introduction The Verifit and RM500SL are full-duplex dual-chan- nel audio measurement systems designed for the Some useful facts about broad-band signals testing and fitting of all types of hearing instruments and many assistive listening devices. They provide...
Page 116 For on-ear mea- peaks not the long-term average. surements, tones are frequency modulated (triangle, ± 3% over 128 ms). Figure 1: 1/3 octave spectra for the pink noise signal and the noise signal specified in ANSI S3.42-1997. 09/01/29 © Etymonic Design Incorporated, 41 Byron Ave., Dorchester, ON, Canada N0L 1G0 USA 800-265-2093 519-268-3313 FAX 519-268-3256 www.audioscan.com...
Page 117 The spec- sponse from different directions and work only with trum of the tone complex from each speaker is in- dependently controlled with 1/12 octave resolution these features disabled. 09/01/29 © Etymonic Design Incorporated, 41 Byron Ave., Dorchester, ON, Canada N0L 1G0 USA 800-265-2093 519-268-3313 FAX 519-268-3256 www.audioscan.com...
Page 118 Figure 6. that level. These three signals may be used to deter- mine the amount of frequency shift provided by fre- quency-lowering hearing aids and the sensation level of the lowered components of the speech signal. 09/01/29 © Etymonic Design Incorporated, 41 Byron Ave., Dorchester, ON, Canada N0L 1G0 USA 800-265-2093 519-268-3313 FAX 519-268-3256 www.audioscan.com...
Page 119 6. Note that curves are 1/3 octave band levels at 1/12 octave intervals which causes the 1/3 octave bands at 4000, 5000 and 6300 Hz to appear broader than 1/3 octave. For clarity, the Speech3150 curve has been omitted. 09/01/29 © Etymonic Design Incorporated, 41 Byron Ave., Dorchester, ON, Canada N0L 1G0 USA 800-265-2093 519-268-3313 FAX 519-268-3256 www.audioscan.com...
Page 120 Figure 5: Loud vocal effort effect in dB re nominal band levels. Nominal band levels are band levels for an overall SPL of 65 dB. This shaping is applied to the 75 dB SPL speech and ICRA signals. Figure 6: Microphone location effects in dB re nominal band SPL. Nominal band levels are band levels for an overall rms level of 65 dB SPL and average vocal effort in a free sound field.
Page 121 In addition to these well-controlled and repeatable bands. Other analyzers use narrower analysis bands, signals, live speech may be used as a test signal. It sometimes having constant bandwidth. As shown in will, of course, be unequalized and at an uncontrolled Figure 7, this can result in significantly underestimat- level.
Page 122 Figure 8: Output (left) and Gain (right) curves for a linear hearing aid, generated using a swept tone (1) and pink noise analyzed in 1/12 octave bands (2). (Dual view not available in RM500SL) Generally, speech will be detectable if the L1 level is at Real-speech signal analysis or near threshold.
Page 123 100 - 200 ms is likely. The Verifit and ty. The envelope and average are calculated over the RM500SL use a 128 ms analysis time period as an ap- full passage to provide stable and repeatable data.
Page 124 Figure 10: Speech is detectable but not understandable if the 99th percentile is at threshold Figure 11: When LTASS is at threshold, SII ≈ 33% which corresponds approximately to SRT 09/01/29 © Etymonic Design Incorporated, 41 Byron Ave., Dorchester, ON, Canada N0L 1G0 USA 800-265-2093 519-268-3313 FAX 519-268-3256 www.audioscan.com...
Page 125 Figure 12: The highest SII is obtained when the entire speech envelope is above threshold Figure 13: Level of 99th percentile for Speechmap speech signals at average vocal effort 09/01/29 © Etymonic Design Incorporated, 41 Byron Ave., Dorchester, ON, Canada N0L 1G0 USA 800-265-2093 519-268-3313 FAX 519-268-3256 www.audioscan.com...
Page 126 Figure 14: Level of 30th percentile for Speechmap speech signals at average vocal effort Figure 15: Dynamic range of Verifit speech signals at average vocal effort 09/01/29 © Etymonic Design Incorporated, 41 Byron Ave., Dorchester, ON, Canada N0L 1G0 USA 800-265-2093 519-268-3313 FAX 519-268-3256 www.audioscan.com...

audioscan RM500SL User Manual

1 About RM500SL

2 Getting Started

3 General Operation

4 General Setup

5 Networking

6 Printing and Storing Results

7 Test Box Measures - Setup

8 ANSI S3.22 Hearing Aid Tests

9 Other Test Box Measures

10 Sensory Loss Simulator

11 On-Ear Measures - Setup

12 On-Ear Measures Screen Setup

13 On-Ear Instrument Measures

14 Occlusion Effect Test

15 RECD (Real-Ear to Coupler Difference)

16 Insertion Gain

17 Speechmap

18 Speechmap Fitting Procedures

19 Speechmap Technical Details

20 Troubleshooting

21 Technical Specifications

22 Glossary

Appendix 1

Appendix 2

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Summary of Contents for audioscan RM500SL

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