Hearing aid measurements with speech and noise signals

Ole Dyrlund, Carl Ludvigsen, Åke Olofsson, Torben Poulsen

Research output: Contribution to journalJournal articleResearchpeer-review


An increasing number of hearing aid types include one or more features which are intentionally non-linear. In such devices measurement of frequency response and distortion using sweep tone measurements are typically of little relevance. Five different non-linear hearing aid types were used to evaluate three different broad-band measuring methods. The results revealed that these methods were meaningful in estimating average frequency response obtained with a specific input signal, but none of the three methods used in the study was able to evaluate separately the effects of the most important signal modifications: memoryless non-linearity like peak clipping, time-varying gain from AGC and additive internal noise.
Original languageEnglish
JournalScandinavian Audiology
Issue number3
Pages (from-to)153-157
Publication statusPublished - 1994

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