Patent ID: 6023517
Filing Date: 2000-02-08
Classification: H04R

Abstract:
A digital hearing aid comprising:storage means for storing hearing characteristics data of a user by a fitting device;input means for inputting an input sound from a microphone and converting said input sound into input data as digital data;analyzing means for deriving acoustic pressure levels per respective frequency bands of said input data;a band-pass filter group dividing said input data into respective frequency components;alarm sound detecting means for detecting whether an alarm sound is contained in said input data or not on the basis of a waveform pattern in respective frequency bands of said input data passed through said filter group;control means for determining amplifications for respective frequency bands required for acoustic sense compensation on the basis of the result of analysis by said analyzing means, the hearing characteristics data from said storage means, and presence or absence of the alarm sound per respective frequency bands from said alarm sound detecting means for feeding amplification data; andacoustic sense compensating means for receiving the input data from said input means and amplification data from said control means, for performing acoustic sense compensating process to increase amplification of the frequency band containing the alarm sound to be greater than those of other frequency bands when the alarm sound contained in a specific frequency band is detected by said alarm sound detecting means, for outputting.