Mogelijkheden en problemen van een meerkanalig hoortoestel
article
With VLSI chips it is possible to design much more sophisticated hearing aids than the present ones. By dividing the audiofrequency range in a number of frequency channels, it will be possible to have an amplitude-frequency response that adapts automatically to the sound spectrum. In this way an optimal use of the reduced dynamic range of the hearing-impaired listener's audiogram can be obtained. In this paper the modulation-transfer function is used to explain why the larger time constants of automatic volume control should be preferred to the traditional small time constants of compression cicuits. Additionally, experimental data are presented indicating that the dynamic variations of the amplitude-frequency response of such a multichannal hearing aid, due to variations in the sound spectrum, have only minor detrimental effects on speech intelligibility.
TNO Identifier
269632
Source
NAG Nederlands akoestisch genootschap journaal(maart)
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