Original scientific paper
Frequency Response Measurements of Hearing Aids Based on Composed Audio Test Signal
Mladen Maletic
Neven Krajacic
Hrvoje Matica
Abstract
This paper describes the implementation of composed audio test signal (CATS) based test system for evaluation of electroacoustic performance of hearing aids. The system applies a frequency-shaped CATS sequence to a hearing aid as an acoustic stimulus and measures the acoustic response of the aid in IEC standard occluded-ear stimulator. The frequency response can then be found by taking the discrete Fourier Transform of the impulse response. This method has several advantages over traditional noise-based methods regard measurements in the absence or presence of the external interference noise.
Keywords
Composed audio test signal – CATS; hearing aid; acoustical measurements
Hrčak ID:
9154
URI
Publication date:
6.12.2006.
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