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Frye FONIX FP35 Quick Reference Manual

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FONIX ® FP35
Quick Reference Guide
©2008 Frye Electronics, Inc. All rights reserved
P/N 010-0021-04

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  • Page 1 FONIX ® FP35 Quick Reference Guide ©2008 Frye Electronics, Inc. All rights reserved P/N 010-0021-04...

  • Page 3: Table Of Contents

    Contents Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 .
  • Page 4 FONIX FP35 Hearing Aid Analyzer 4 . 3 . 3 Creating an NAL-NL1 Target . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4 .

  • Page 5: Chapter 1: Introduction

    Chapter 1 Introduction Welcome to the FP35 quick reference guide. This manual explains all the major features of the FP35 analyzer, but is not a comprehensive guide to all of its functions. If you require further explanation or details, see the FP35 Operator’s Manual.

  • Page 6: Key Operation

    FONIX FP35 Quick Reference Guide 6. Menu: Opens the local menu or the default settings menu. 7. Exit: Exits from a screen. 8. Back & Next: Moves to the next measurement screen or through the menu system. 9. Arrow keys (up, down, right, left): Changes amplitude and frequency selec- tions when in a measurement screen, and menu selections when in a local menu.

  • Page 7: Using The Local Menus

    1: Introduction Figure 1.2.2—Help Screen 1.2.3 Using the local menus Pressing the [MENU] button when in a measurement screen will open the local menu containing selection that pertain to the current screen. For instance, press- ing [MENU] while in the ANSI 96 screen will open a local menu containing ANSI 96 selections.

  • Page 8: Default Settings

    FONIX FP35 Quick Reference Guide Figure 1.2.3—Local Menu 1.3 Default Settings It’s possible to change the default selections of many of the FP35 analyzer’s set- tings. For instance, you might want to select Digital Speech as your default real- ear source type, or have the default source levels of CRV 1-4 be 50, 65, 80, and 90 dB SPL.
  • Page 9 1: Introduction 5. Press [NEXT] to enter the final Default Settings menu. Use the arrow keys to set up your selections. 6. Press [F5] to store all three menus into the SETTINGS number displayed above [F2]. To switch to a different saved setting configuration: • Use [F1] from the Opening screen to switch between SETTINGS 1, 2, & 3.

  • Page 10: User Level Mode

    FONIX FP35 Quick Reference Guide 1.4 User Level Mode The FP35 analyzer has two user levels: EASY and ADVANCED. In Easy Mode, the measurement screens contain a little less information, but have a cleaner look. The local menus also contain fewer settings so that the user can focus on only the most important ones that are used in day to day testing activities.

  • Page 11: Chapter 2: Coupler Multicurve

    Chapter 2 Coupler Multicurve In the Coupler Multicurve screen, you can view curves in dB SPL or dB Gain, and run them with pure-tone, Composite, and Digital Speech signals (the latter two are only available with the Composite Option.) Up to four curves can be measured and displayed at the same time.

  • Page 12: Frequency Response Measurements

    FONIX FP35 Quick Reference Guide Figure 2.1—Leveling setup Leveling is not automatically saved into the analyzer’s permanent memory. If you want to avoid releveling the chamber after you turn off the analyzer and turn it back on again, you will need to save the leveling.

  • Page 13: Performing A Measurement

    2: Coupler Multicurve When the Composite/Digital Speech Option is ordered, the FP35 analyzer will also include these signals: • COMP: broadband speech-weighted signal • DIG SPCH: modulated, broadband, speech-weighted signal for testing digital hearing aids. You can use any of these signal types when performing frequency response mea- surements in the Coupler Multicurve screen.

  • Page 14: Testing Digital Aids

    FONIX FP35 Quick Reference Guide Figure 2.2.2—Frequency response measurement 2.2.3 Testing Digital Aids The best way to get an accurate frequency response of a digital hearing aid is to use the Digital Speech signal. It’s also useful to test the digital aid with the Composite signal.

  • Page 15: Testing Harmonic Distortion

    2: Coupler Multicurve Figure 2.2.3—Digital speech curve comparison 2.2.4 Testing Harmonic Distortion Harmonic distortion occurs when a hearing aid clips the peak of a pure-tone input signal, resulting in artifacts at harmonics (integer multiples) of that input signal. For example, if you present a 500 Hz tone to the hearing aid, distortion artifacts could occur at 1000 Hz and 1500 Hz.

  • Page 16: Testing Intermodulation Distortion

    FONIX FP35 Quick Reference Guide 4. Use the [ ] keys to select DISTORTION. 5. Use [ ] to select the type of harmonic distortion measurement you want to make. When in doubt, select TOTAL. 6. Press [EXIT] to close the local menu.
  • Page 17 2: Coupler Multicurve In the FP35 IM Distortion test, the analyzer presents two tones simultaneously. The frequency distance between these two tones is set by the user. Any ampli- tudes found at frequencies other than the original two tones is considered dis- tortion.
  • Page 18 FONIX FP35 Quick Reference Guide Figure 2.2.5—IM distortion measurement...

  • Page 19: Chapter 3: Automated Test Sequences

    Chapter 3 Automated Test Sequences 3.1 The ANSI Sequence The ANSI test sequence allows you to test hearing aids according to the ANSI S3.22 standard. You can use the ANSI test to control the quality of the hearing aids that you dispense. Compare the manufacturer’s specifications with your own ANSI measurements of an aid.

  • Page 20: Running An Ansi Test

    FONIX FP35 Quick Reference Guide Setting up a Linear Aid For ANSI 96, use [F1] to select LINEAR 50 or LINEAR 60. Your selection should be based upon manufacturer specifications. If the specifications are unavailable, use: • 50 dB for aids with high gain and relatively low output.
  • Page 21 3: Automated Test Sequences Figure 3.1.2A—ANSI test completed Figure 3.1.2B—ANSI 96 test, I/O Screen...

  • Page 22: Testing Digital Hearing Aids

    FONIX FP35 Quick Reference Guide 3.1.3 Testing Digital Hearing Aids The ANSI S3.22-1996 “labeling” standard for hearing aids was not designed with digital hearing aids in mind. In fact, most of the testing methods employed by ANSI 96 have been around since the 1970s. However, since ANSI is a stan- dard, in order to conform to that standard, it must use only the testing tech- niques outlined in the standard.

  • Page 23: Running An Iec Test

    3: Automated Test Sequences 3.2.2 Running an IEC Test 1. Level the sound chamber, if needed. 2. Push the [START/STOP] button. 3. The FP35 will pause during the measurement process in order to let you adjust the gain of the hearing aid to the reference test position. a.
  • Page 24 FONIX FP35 Quick Reference Guide Figure 3.2.2B—IEC test results, I/O Screen...

  • Page 25: Chapter 4: Real-Ear Measurements

    Chapter 4 Real-Ear Measurements 4.1 Introduction When the Real-Ear Option is ordered with your FP35 analyzer, you can test the hearing aid inside the patient’s ear using the probe microphone. When performed correctly, this is the most accurate measurement available of the hearing aid’s performance because it is performed using the patient’s own ear canal resonance.

  • Page 26: Real-Ear Setup

    FONIX FP35 Quick Reference Guide Audiogram Entry Real-Ear SPL Insertion Gain Real Ear Unaided & Aided Figure 4.1.2—Real-ear navigation using next and back buttons 4.2 Real-Ear Setup If you are using the FP35 as a portable unit, you can easily convert the internal sound chamber into a sound field speaker.

  • Page 27: Internal Speaker Setup

    4: Real-Ear Measurements Note: If you want to use a a 90 dB signal during your measurements, the 12 inch distance is very important. If the client is too far away, a message box will open, alerting you to move the client closer. Don’t forget to relevel for the client’s new position.

  • Page 28: External Speaker Setup

    FONIX FP35 Quick Reference Guide • Make sure all cables in the compartment are put away so they will not interfere with replacing the speaker. • Set the speaker back in the compartment. As you do this, guide the speaker wire so it stays to the side of the speaker, not underneath it.

  • Page 29: Placing The Probe Tube

    4: Real-Ear Measurements 4.2.4 Placing the Probe Tube To ensure the proper insertion depth of the probe tube into the ear canal, the following marking procedure is necessary. After some practice, the procedure is easy. 1. Place an unattached probe tube on a flat surface along with the client’s earmold or shell as shown in Figure 4.2.4A so that the tube rests along the bottom of the canal part of the earmold, with the tube extending at least 5 mm past the canal opening.

  • Page 30: Placing The Sound Field Speaker

    FONIX FP35 Quick Reference Guide 4.2.5 Placing the Sound Field Speaker The placement of the sound field speaker can have a big influence on the accuracy and repeatability of your real-ear measurements. Research has shown that a consistent placement of 45 degrees azimuth to the client produces the most repeatable testing results.
  • Page 31 4: Real-Ear Measurements Only the larger reference microphone is used during the leveling process. However, to speed things up and ensure the client is in the same position during leveling and during the measurement process, it is recommended that you insert the probe tube in the client’s ear for the leveling process.

  • Page 32: Audiogram Entry Screen-Creating A Target

    FONIX FP35 Quick Reference Guide 4.3 Audiogram Entry Screen—Creating A Target Creating a target for one or both ears is actually something you can do before the client even enters the office. The first thing you have to do is enter the audiogram.

  • Page 33: Creating An Nal-Nl1 Target

    4: Real-Ear Measurements 4. Use [F2] to select HTL. A small arrow cursor will appear in the HTL column of the data entry box. 5. Use the [5 ,6] keys to move the cursor through the frequencies. Use the [3, 4] to enter the client’s threshold levels in dB HL at each frequency.

  • Page 34: Measuring The Real-Ear To Coupler Difference

    FONIX FP35 Quick Reference Guide 4. Press [F2] until HTL is selected. A small arrow cursor will appear in the HTL column of the data entry box. 5. Use the [5 ,6] keys to move the cursor through the frequencies. Use the [3, 4] to enter the client’s threshold levels in dB HL at each frequency.

  • Page 35: Client Setup For Recd

    4: Real-Ear Measurements 7. Press [F2] repeatedly until RECD (or REDD) is selected. You will see an additional column of average RECD information for the selected age appear on the screen. 8. Make sure that SHOW RECD is displayed above [F5]. If it isn’t, press [F5] to toggle the display.

  • Page 36: Taking The Recd Measurement

    FONIX FP35 Quick Reference Guide Foam eartip I N S E R T E A R P H O Probe mic Probe mic Figure 4.3.4.2A—Insert probe microphone Figure 4.3.4.2B— Insert foam eartip connected to insert microphone 4.3.4.3 Taking the RECD Measurement If you’ve performed the steps described in Sections 4.3.4.1 and 4.3.4.2, you just have...
  • Page 37 4: Real-Ear Measurements Figure 4.4A—Real Ear Aided & Unaided screen Figure 4.4B—Real-Ear Insertion Gain screen...

  • Page 38: Measuring The Unaided Response

    FONIX FP35 Quick Reference Guide 4.4.1 Measuring the Unaided Response The first step in taking an insertion gain measurement is to measure the unaided response. You can do this from either the Unaided & Aided Response Screen or the Insertion Gain Screen.

  • Page 39: Measuring The Aided Response

    4: Real-Ear Measurements 4.4.2 Measuring the Aided Response The second step in an insertion gain measurement is the aided response. If you would like to view the measurement as an insertion gain curve and compare it to an insertion gain target, take this measurement from the Insertion Gain Screen. If you would prefer to view the aided gain, take this measurement from the Unaided &...

  • Page 40: Testing Automatically

    FONIX FP35 Quick Reference Guide Figure 4.4.2 —Unaided and aided response 4.4.3 Testing Automatically The FP35 analyzer has the capability of performing automatic real-ear aided measurements. This feature automatically tests the three aided measurements automatically without needing user intervention between measurements. Auto Test always measured AIDED 1, 2, and 3, in that order.
  • Page 41 4: Real-Ear Measurements To test directionality: 1. Place the probe tube in your client’s ear as described in Section 4.2.4, and level the sound field speaker as described in Section 4.2.6. Although we usually recommend a 45º azimuth for real-ear measurements, for this measurement you should use a 0º...
  • Page 42 FONIX FP35 Quick Reference Guide Figure 4.4.4A—“Reverse” directional aid setup Figure 4.4.4B—“Forward” and “reverse” directional aid measurements in the real-ear unaided & unaided screen...

  • Page 43: Testing In The Spl Screen

    4: Real-Ear Measurements Figure 4.4.4C—Amount of amplification advantage provided by the directional microphones 4.5 Testing in the SPL Screen The SPL screen permits the user to view all the major components of a client’s hearing loss and hearing aid fitting on one screen in dB SPL. The hearing thresholds and uncomfortable loudness levels, which are generally measured in HL, are converted to SPL.

  • Page 44: Viewing The Spl Display

    FONIX FP35 Quick Reference Guide 4.5.1 Viewing the SPL Display The information on the SPL screen is similar to the information in the other real- ear measurement screens. However, in addition to the measurement curves and the SPL-converted target, the SPL Screen also displays SPL-converted thresholds and uncomfortable levels, allowing you to directly compare the measurement curves to the audiometric information.

  • Page 45: Testing Automatically

    4: Real-Ear Measurements 6. Use [F2] to select AIDED 1. 7. Use [F4] to select the source type for AIDED 1, and use the [5 , 6] buttons to set the source amplitude 8. Have the client resume the position they were in during leveling, and remind him to stay still while the signal is on.

  • Page 46: Live Speech Testing

    FONIX FP35 Quick Reference Guide 3. Press [EXIT] to close the menu. 4. Press [START/STOP]. The analyzer will automatically test AIDED 1, AIDED 2, and AIDED 3. The Auto Test feature can be defaulted to on. See Section 1.3 for details 4.6 Live Speech Testing...

  • Page 47: Measuring The Occlusion Effect

    4: Real-Ear Measurements 2. Instruct your patient’s spouse speak to the client about 6 feet away (2 meters). It helps to have something for them to read. The screen will display the aid’s response to this speech and how it relates to the speech banana. A second curve composed of small diamonds will also be displayed.
  • Page 48 FONIX FP35 Quick Reference Guide To set up for measuring the occlusion effect: 1. Enter the Unaided & Aided screen. To do this, press [F2] from the Opening screen and use [NEXT] or [BACK] until the Unaided & Aided screen appears.

  • Page 49: Chapter 5: 2-Cc Targets

    Chapter 5 2-CC Targets In the 2-cc target screens, you can measure hearing aids using a coupler in a sound chamber and compare them to a target. This type of testing is especially useful when fitting a patient who is unable to sit still for a real-ear measurement, such as an infant or a young child.

  • Page 50: Target Creation

    FONIX FP35 Quick Reference Guide 5.1 Target Creation In order to create a target for use in the Coupler Target or Coupler EarSim screen, you must enter the patient’s threshold values in the Audiogram Entry screen, just as you would if you were creating a real-ear target.

  • Page 51: Coupler Earsim

    5: 2-cc Targets Figure 5.2—Coupler Target screen. 5.3 Coupler EarSim Press [NEXT] from the Coupler Target screen or [BACK] from the Coupler Multicurve screen to enter the Coupler EarSim screen. In the Coupler EarSim screen, the actual real-ear target prescribed for the patient is displayed in either dB IG (insertion gain) or dB SPL.
  • Page 52 FONIX FP35 Quick Reference Guide Figure 5.3—Coupler EarSim screen. See Section 2.2 for instructions on how to perform measurements in the Coupler EarSim screen—the operation of the Coupler EarSim screen is identical to the operation of the Coupler Multicurve screen.

  • Page 53: Index

    FONIX FP35 Quick Reference Guide Index Aided Response 35 IEC 18 Settings 4 ANSI 15 Insertion Gain 21, 32 Setup Insertion Gain Screen 32 ANSI 03 15 real-ear 22 Intermodulation distortion SHORT 8 ANSI 96 15 Arrow keys 2 simulated real-ear 47...

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