Interacoustics AD629 Instructions For Use Manual page 27

Device for diagnosing hearing loss

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Master hearing aid test

MHA is a hearing aid simulator that consists of three high pass filters of -6 dB, -12 dB, -18 dB per octave

and a HFE filter (High Frequency Emphasis) equivalent to -24 dB per octave through the audiometric

headphones. This gives a sense of the benefits of a hearing aid and what could eventually be gained by

getting properly fitted hearing aids. The filters can be activated individually on both channels enabling the

audiometer to serve as a 2 channel master hearing aid.

Function key

MHA/HIS wave files can be installed the following way:

1. Zip the selected wave files into a file named "update_mha.mywavefiles.bin" (make sure the file

extension is bin and not zip)

2. Copy the files to a newly FAT32 formatted USB memory stick

3. Insert the stick into one of the USB connections on the AD629

4. Go to Common Setup and press "Install"

5. Wait for the installation to complete

6. Restart the AD629

D-0133833-A – 2022/09

AD629 - Instructions for Use - EN

Description

Only available if High Frequency is available (optional license) on the AD629.

Selects the HF phone connected to the separate HF connectors.

Filter channel 1.

Filter channel 2.

If MHA/HIS wave file is installed, they can be selected here.

Start MHA test.

Stop MHA test.

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