Interacoustics AC40 Instructions For Use Manual
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Interacoustics AC40 Instructions For Use Manual

Clinical audiometer
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Instructions for Use – US
AC40
Clinical Audiometer
D-0100764-E 2016/06

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Summary of Contents for Interacoustics AC40

  • Page 1 Instructions for Use – US AC40 Clinical Audiometer D-0100764-E 2016/06...

  • Page 3: Table Of Contents

    3.6.5 Auto settings ......................38 3.6.6 MLD settings ......................39 3.6.7 Sessions and clients ....................40 Printing ..........................41 AC40 Stand Alone Unit, Print Logo Update ..............41 Diagnostic Suite ........................ 43 3.9.1 Instrument setup ..................... 43 3.9.2 SYNC Mode ......................44 3.9.3 The Sync Tab ......................

  • Page 5: Introduction

    1.3 Product Description The AC40 is a full 2 channel clinical audiometer offering air, bone, speech and built in free field amplier. It offers a wide range of clinical test features such as high frequency, multi frequency, weber, SISI, etc.

  • Page 6: In The Box

    AC40 Instructions for Use - US Page Included Parts AC40 Goose neck 1059 microphone DD45 Audiometric headset B81 bone conductor headset 2 x APS3 Patient response switch HDA300 Phone headset for HF Cleaning cloth Power cable Instructions for Use AC40...

  • Page 7: Warnings

    AC40 Instructions for Use - US Page 1.4 Warnings Throughout this manual the following meaning of warnings, cautions and notices are used: WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury. CAUTION, used with the safety alert symbol, indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
  • Page 8 AC40 Instructions for Use - US Page...

  • Page 9: Unpacking And Installation

    Return Report will be of great help to us and is your best guarantee that the correction of the problem will be to your satisfaction. Storage If you need to store the AC40 for a period, please ensure it is stored uder the conditions specified in the section for technical specifications:...

  • Page 10: Marking

    This symbol indicates that when the end-user wishes to discard this product, it must be sent to separate collection facilities for recovery and recycling. The CE-mark indicates that Interacoustics A/S meets the requirements of Annex II of the Medical Device Directive 93/42/EEC.
  • Page 11 No modification of this equipment is allowed without Interacoustics authorization. Interacoustics will make available on request circuit diagrams, component part lists, descriptions, calibration instructions, or other information that will assist service personnel to repair those parts of this audiometer that are designated by the Interacoustics as repairable by service personnel Never insert or in any way use the insert headset without a new clean non defect test tip.
  • Page 12 AC40 Instructions for Use - US Page Within the European Union it is illegal to dispose electric and electronic waste as unsorted municipal waste. Electric and electronic waste may contain hazardous substances and therefore has to be collected separately. Such products will be marked with the crossed-out wheeled bin shown below.

  • Page 13: Getting Started - Setup And Installation

    Talk forward mic. The top left part of the AC40 (display holder) contains the two monitor speakers. The left side of the instrument contains two mini jack connectors for a microphone and a headphone – or a headset. This is used for talkback headphone/speaker (TB) and talk forward microphone (TF). Next to that two USB connectors are located.

  • Page 14: Back Panel External Connections - Standard Accessories

    HF Headphone connectors for HLS. This is prepared for future use. • In addition to the standard DD45 headset, four other air conduction transducers may be used (they all connect to specific outputs on the AC40): • HDA300: High Frequency requires a HF headset.

  • Page 15: Pc-Interface

    This has the first priority. • Priority 2: The swan neck microphone (1) of the AC40 is located above the “Talk Forward” (24) button. If no mic. is connected to the priority 1 mic., this with be used.

  • Page 16: Operating Instructions

    AC40 Instructions for Use - US Page 3.4 Operating instructions The figure below shows the outline of the front plate of the AC40 including buttons, dials and display: (19) (10) (11) (12) (13) (14) (15) (16) (17) (20) (21) (22) (23)
  • Page 17 AC40 Instructions for Use - US Page Response Indicator / Indication light is seen when the patient activates the patient VU meter signal using the patient response. A red indicator is used for patient response 1 and a blue is used for patient response 2:...
  • Page 18 AC40 Instructions for Use - US Page To save the settings use “Save all settings as...”. To use another user setting (protocol/profile) use “Load user settings: ..”. Inside a settings menu, choose between the different settings using the right rotary wheel (58). Change the individual settings using the left rotary wheel (57).
  • Page 19 Allows results to be printed directly after testing (via a supported Clients USB printer – please contact Interacoustics customer service for a list of supported PC printers if in doubt). The printout logo can be configured via the Diagnostic Suite (in the General Setup a logo image can be downloaded to the instrument from the PC).
  • Page 20 AC40 Instructions for Use - US Page The (optional) Pediactric Noise stimuli can be acticated from the Test (20) menu. When this stimulusi is selected the Warble light indicater will blink in a slow interval. Wavefile Enables one to perform speech testing on channel 1 using loaded Channel 1 wave files, i.e.
  • Page 21 Talk Back When active it allows the clinician to hear comments or responses from the patient through the AC40 or monitor headset. Adjust the gain by holding down the button for one second and turning one of the rotary wheels (57)/(58) while holding the Talk Back button.
  • Page 22 Use this function if the patient has shown no response to stimuli. Down / Incorrect Is used to decrease the frequency level. The AC40 has an incorporated automatic speech score counter. Therefore as a second function you can use this button as an “Incorrect” button when performing speech tests. For automatic speech score counting while testing speech push this button after each word not repeated correctly by the patient.

  • Page 23: Tests Screens And Function Key Descriptions

    AC40 Instructions for Use - US Page 3.5 Tests Screens and Function Key Descriptions The following tests are available from the Test (20) button. Use rotary wheels (57)/(58) to select the individual test screen: • Tone • Stenger • ABLB – Fowler •...

  • Page 24: Tone Test

    AC40 Instructions for Use - US Page 3.5.1 Tone Test The Tone test screen is used for pure/warble tone audiometry via normal head phones or insert phones, bone conduction, free field audiometry, multi frequency (optional test) as well as high frequency/high frequency zoom (optional).

  • Page 25: Stenger Test

    AC40 Instructions for Use - US Page 3.5.2 Stenger Test The Stenger test is a test when a patient is suspected of feigning/faking a hearing loss and is based on the auditory phenomenon, “The Stenger Principle”, that states that only the louder of two similar tones presented to both ears at the same time will be perceived.

  • Page 26: Weber

    AC40 Instructions for Use - US Page 3.5.5 Weber The Weber test distinguished between conductive and sensorineural hearing loss through use of a bone conductor. Use the indications to show where the tone is perceived. If the patient hears the tone better in the poorer ear the hearing loss is conductive, and the tone is heard better in the better ear the hearing loss is sensorineural at the given frequency.
  • Page 27 AC40 Instructions for Use - US Page sometimes also referred to as SDS (Speech Discrimination Scores) and represents the number of words correctly repeated expressed as a percentage. Note that there is a predictable relationship between the patients pure tone threshold and speech threshold.
  • Page 28 AC40 Instructions for Use - US Page The condition under which the speech test is done: None, Aided, Binaural or Aided & Binaural. Switch between magnified top bar and normal sized top bar. Use the HL dB dial (57) to select the different items from the lists: Different lists can be changed in the “List”...
  • Page 29 AC40 Instructions for Use - US Page Hughson-Westlake Test Hughson Westlake is an automatic pure tone test procedure. The threshold of hearing is defined as 2 out of 3 (or 3 out of 5) correct responses at a certain level in a 5dB increase and a 10dB decrease test procedure.
  • Page 30 AC40 Instructions for Use - US Page Békésy Test Békésy is a type of automatic audiometry. It is diagnostically important from the classification of the results into one of the five types (after Jerger, et al) when responses to continuous and pulsed tones are compared.
  • Page 31 AC40 Instructions for Use - US Page QuickSIN Test Difficulty with hearing in background noise is a common complaint among hearing aid users. Therefore, the measurement of SNR loss (signal-to-noise ratio loss) is important because a person’s ability to understand speech in noise cannot be reliably predicted from the pure tone audiogram. The QuickSIN test was developed to provide a quick estimate of SNR loss.
  • Page 32 AC40 Instructions for Use - US Page Masking Level Difference Test MLD refers to the improvement in speech intelligibility in noise when a tone is presented in and out of phase respectively. It aims to assess central auditory function but peripheral changes may also affect the MLD.
  • Page 33 AC40 Instructions for Use - US Page SISI Test SISI is designed to test the ability to recognise 1 dB increase in intensity during a series of bursts of pure tones presented 20 dB above the pure tone threshold for the test frequency. It can be used to differentiate between cochlear and retrocochlear disorders as a patient with a cochlear disorder will be able to perceive the increments of 1 dB, as where a patient with a retrocochlear disorder will not.
  • Page 34 2. Copy the files to a newly FAT32 formated USB memory stick 3. Insert the stick into one of the USB connections on the AC40. 4. Go to Common Setup and press “Install” 5. Wait for the installation to complete.
  • Page 35 AC40 Instructions for Use - US Page Hearing Loss Simulation Test The HLS offers a simulation of the hearing loss through the audiometric headphones or the high frequency headset and is primarily aimed at the family members of the hearing impaired. It is a valuable tool as a hearing loss in many families may result in frustrations and misunderstandings.
  • Page 36 AC40 Instructions for Use - US Page Tone decay This is a test to help identify the adaptation of the auditory system (Carhart, 1957). It involves measuring the perceptual reduction in a continuous tone over time. This can indicate towards a cochlear or neural cause of deafness.

  • Page 37: Setup

    Inside a settings menu, choose between the different settings using the right rotary wheel (58). Change the individual settings using the left rotary wheel (57). Here an example from the Tone settings dialogue where “Aided” is in focus: For a detailed description of the setting dialog, please refer to AC40 Quick Guides found here: http://www.interacoustics.com/ac40...

  • Page 38: Instrument Setup

    AC40 Instructions for Use - US Page 3.6.1 Instrument Setup The screen shot below shows the Instrument Settings menu: 3.6.2 Common settings - AUD The screen shot below shows the common settings menu:...
  • Page 39 AC40 Instructions for Use - US Page In Common Setup “Shift+Setup” opens the following About box: Function keys Description Select client list. Install new firmware or wave files from USB stick. Uninstall items. Use shift to activate this. Go back.

  • Page 40: Tone Setting

    AC40 Instructions for Use - US Page 3.6.3 Tone setting The screen shot below shows settings for Pure Tone testing: Function key Description Show settings for the speech banana. Go back. Save user setting (protocol)

  • Page 41: Speech Settings

    AC40 Instructions for Use - US Page 3.6.4 Speech settings The screen shot below shows settings for Speech testing: Function key Description Phonem norm curve settings. FF norm curve setting. Go back. Save user setting (protocol)

  • Page 42: Auto Settings

    AC40 Instructions for Use - US Page 3.6.5 Auto settings Function key Description Go back. Save user setting (protocol)

  • Page 43: Mld Settings

    AC40 Instructions for Use - US Page 3.6.6 MLD settings Function keys Description Go back. Save user setting (protocol)

  • Page 44: Sessions And Clients

    AC40 Instructions for Use - US Page 3.6.7 Sessions and clients Save a session (22) after testing or alternatively create a new session by holding “Shift” (18) and pressing the “Save Session” button. In the “Save Session” (22) menu it is possible to save sessions, delete and create clients and edit client names.

  • Page 45: Printing

    Direct printout: Allows results to be printed directly after testing (via a supported USB printer – please contact Interacoustics customer service for a list of supported PC printers if in doubt). The printout logo can be configured via the audiometer itself (see below) or via the Diagnostic Suite (in the General Setup a logo impage can be downloaded to the instrument from the PC).
  • Page 46 AC40 Instructions for Use - US Page 13. With the audiometer turned off insert the thumb drive into any available USB port 14. Turn on the instrument and push the Temp/Setup Button from the Tone test screen 15. Enter “Common Settings” using the Setup/Tests Button 16.

  • Page 47: Diagnostic Suite

    AC40 using the “Up Print Logo” button. The symbol scheme used in the Diagnostic Suite can be transferred to the AC40 (when viewing the build in audiogram) by using the “Upload Custom Symbols” button. Please refer to the AC40 operational manual for info on how to change the symbol scheme on the AC40.

  • Page 48: Sync Mode

    3.9.3 The Sync Tab If there is several sessions stored on the AC40 (under one or more patients) then the Sync tab must be used. The screen shot below shows the Diagnostic Suite with the SYNC tab open (underneath the AUD and IMP tabs in the upper right corner).

  • Page 49: Session Download

    AC40 Instructions for Use - US Page 3.9.5 Session download The following screen shot shows the session download screen: When pressing the icon the functionality of the “Session download” screen is described:...

  • Page 50: Hybrid (Online/Pc-Controlled) Mode

    3.10 Hybrid (Online/PC-Controlled) Mode The following screen shots show the Diagnostic Suite AUD tab when running AC40 in “hybrid mode”. This mode allows for the AC40 to be “on-line” connected to the PC – i.e. a trued hybrid audiometer: •...

  • Page 51: Maintenance

    AC40 Instructions for Use - US Page 4 Maintenance 4.1 General Maintenance Procedures It is recommended that routine check procedures are carried out weekly in full on all equipment in use. Check 1-9 outlined below should be followed on the equipment on each day of use.

  • Page 52: How To Clean Interacoustics Products

    Make sure not to get moisture in the speaker portion of the earphones and similar parts 4.3 Concerning Repair Interacoustics is only considered to be responsible for the validity of the CE marking, effects on safety, reliability and performance of the equipment if: 1.

  • Page 53: Warranty

    Accessories are free from defects in material and workmanship under normal use and service for a period of ninety (90) days from the date of delivery by Interacoustics to the first purchaser. If any product requires service during the applicable warranty period, the purchaser should communicate directly with the local Interacoustics service centre to determine the appropriate repair facility.
  • Page 54 AC40 Instructions for Use - US Page...

  • Page 55: General Technical Specifications

    IEC 60601-1-2:2007 Audiometer Standards Tone: IEC 60645-1:2012/ANSI S3.6:2010 Type 1- Speech: IEC 60645-2:1993/ANSI S3.6:2010 Type A or A-E Calibration Calibration information and instructions is located in the AC40 Service manual Air Conduction TDH39: ISO 389-1 1998, ANSI S3.6-2010 DD45: PTB/DTU report 2009 HDA300: PTB report PTB 1.61 –...
  • Page 56 AC40 Instructions for Use - US Page Masking Automatic selection of narrow band noise (or white noise) for tone presentation and speech noise for speech presentation. Narrow band noise: IEC 60645-1 2012, 5/12 Octave filter with the same centre frequency resolution as pure Tone.

  • Page 57: Reference Equivalent Threshold Values For Transducers

    AC40 Instructions for Use - US Page Output Specifications FF 1/2/3/4 Line output 7Vrms at 2KOhms load 60-20000Hz -3dB FF 1 / 2 / 3 / 4 - 4x20W (only 2x20W can be used by software at the moment) powered Left &...
  • Page 59 AC40 RETSPL-HL Tabel 5.1 Survey of reference and max hearing level Tone Audiometer. Pure Tone RETSPL Transducer DD45 TDH39 HDA280 HDA200 HDA300 EAR3A IP30 EAR5A CIR22/33 10 Ω 10 Ω 37 Ω 40 Ω 23 Ω 10 Ω 10 Ω...
  • Page 61 AC40 RETSPL-HL Tabel Pure Tone max HL Transducer DD45 TDH39 HDA280 HDA200 HDA300 EAR3A IP30 EAR5A CIR22/33 10 Ω 10 Ω 37 Ω 40 Ω 23 Ω 10 Ω 10 Ω 10 Ω 68 Ω 10 Ω 12.5 Ω Impedance...
  • Page 62 AC40 RETSPL-HL Tabel NB noise effective masking level Transducer DD45 TDH39 HDA280 HDA200 HDA300 EAR3A IP30 EAR5A CIR22/33 10 Ω 10 Ω 37 Ω 40 Ω 23 Ω 10 Ω 10 Ω 10 Ω 68 Ω 10 Ω 12.5 Ω...
  • Page 63 AC40 RETSPL-HL Tabel NB noise max HL Transducer DD45 TDH39 HDA280 HDA200 HDA300 EAR3A IP30 EAR5A CIR22/33 10 Ω 10 Ω 37 Ω 40 Ω 23 Ω 10 Ω 10 Ω 10 Ω 68 Ω 10 Ω 12.5 Ω Impedance...
  • Page 64 AC40 RETSPL-HL Tabel 5.2 Maximum hearing level settings provided at each test frequency ANSI Speech RETSPL Transducer DD45 TDH39 HDA280 HDA200 HDA300 EAR3A IP30 EAR5A CIR22/33 10 Ω 10 Ω 37 Ω 40 Ω 23 Ω 10 Ω 10 Ω...
  • Page 65 AC40 RETSPL-HL Tabel IEC Speech RETSPL Transducer DD45 TDH39 HDA280 HDA200 HDA300 EAR3A IP30 EAR5A CIR22/33 10 Ω 10 Ω 37 Ω 40 Ω 23 Ω 10 Ω 10 Ω 10 Ω 68 Ω 10 Ω 12.5 Ω Impedance Coupler...
  • Page 66 AC40 RETSPL-HL Tabel Sweden Speech RETSPL Transducer DD45 TDH39 HDA280 HDA200 HDA300 EAR3A IP30 EAR5A CIR22/33 10 Ω 10 Ω 37 Ω 40 Ω 23 Ω 10 Ω 10 Ω 10 Ω 68 Ω 10 Ω 12.5 Ω Impedance Coupler...
  • Page 67 AC40 RETSPL-HL Tabel Norway Speech RETSPL Transducer DD45 TDH39 HDA280 HDA200 HDA300 EAR3A IP30 EAR5A CIR22/33 10 Ω 10 Ω 37 Ω 40 Ω 23 Ω 10 Ω 10 Ω 10 Ω 68 Ω 10 Ω 12.5 Ω Impedance Coupler...
  • Page 68 AC40 RETSPL-HL Tabel Free Field ANSI S3.6-2010 Free Field max SPL ISO 389-7 2005 Free Field max HL is found by subtracting the selected RETSPL value Binaural to Binaural Free Field Power Free Field Line Monaural 0° 45° 90° correction...
  • Page 69 AC40 RETSPL-HL Tabel Sweden Free Field Free Field max SPL ISO 389-7 2005 Free Field max HL is found by subtracting the selected RETSPL value Binaural to Binaural Free Field Power Free Field Line Monaural 0° - 45° - 90°...
  • Page 70 AC40 RETSPL-HL Tabel Sound attenuation values for earphones Frequency Attenuation TDH39/DD45 with MX41/AR EAR 3A IP30 HDA200 HDA300 or PN 51 EAR 5A Cushion [dB]* [Hz] [dB]* [dB]* [dB] 12.5 12.7 1000 12.8 1250 1500 1600 2000 15.1 2500 3000...
  • Page 71 AC40 Pin Assignment 5.3 AC40 Pin assignment Socket Connector Pin 1 Pin 2 Pin 3 Mains Live Neutral Earth IEC C13 Left, Right Ins. Left, Ins. Right Ground Signal HF Left, HF Right Bone 1, Bone 2 Ins. Mask. 6.3mm Mono Mic.
  • Page 73 The AC40 has been tested for EMC emissions and immunity as a standalone AC40 . Do not use the AC40 adjacent to or stacked with other electronic equipment. If adjacent or stacked use is necessary, the user should verify normal operation in the configuration.
  • Page 74 Note: UT is the A.C. mains voltage prior to application of the test level. Guidance and manufacturer’s declaration — electromagnetic immunity The AC40 is intended for use in the electromagnetic environment specified below. The customer or the user of the AC40 should assure that it is used in such an environment, Electromagnetic environment –...
  • Page 75 Other : Date : Person : Please provide e-mail address or fax No. to whom Interacoustics may confirm reception of the returned goods: The above mentioned item is reported to be dangerous to patient or user In order to ensure instant and effective treatment of returned goods, it is important that this form is filled in and placed together with the item.

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