JP2003503924A5 - - Google Patents

Claims (2)

First and second sound receiving microphone means (Fmic, Bmic) spaced apart, a signal processor for processing a signal supplied from the microphone means, and generating a sound signal in response to an output signal from the signal processor In order to control the directivity of the sound reception characteristic of a hearing aid equipped with an output transducer, the step of switching the sound reception characteristic between the omnidirectional characteristic and the directivity characteristic, and operating the hearing aid with the directivity characteristic A method of adding a time or phase delay adjustable to at least one signal, comprising combining the signals supplied from the first and second microphone means into a total combined signal,
Controlled attenuation of the signal resulting from the switching of the sound reception characteristics from omnidirectional to directional characteristics or vice versa is derived from both the signals from the first and second microphone means ( _Xfront , _Xback ). And performing a time or phase controlled delay, and then using the adjustable attenuation control parameter (omni) and delay (T) to generate the overall composite signal (Y) described above, thereby , The overall combined signal (Y) is

As a switch or gradually and between the omnidirectional and any desired form of the directional characteristics with little impact on the phase relationship, time delay and amplitude characteristics of the hearing aid. A method characterized by switching the hearing aid as a smooth change. First and second sound receiving microphone means (Fmic, Bmic) spaced apart, a signal processor for processing a signal supplied from the microphone means, and generating a sound signal in response to an output signal from the signal processor An output transducer, and a switching control means for switching a sound reception characteristic between an omnidirectional characteristic and a directional characteristic, and the first and second microphone means (Fmic) when operating with the directional characteristic. , Bmic), combining means (4, 5, 6; 12, 13, 16, 17) for generating an overall synthesized signal and supplying it to the signal processor, at least one signal In a hearing aid with controllable directivity of sound receiving characteristics, with adjustable time or phase delay means (3; 14, 15) to produce a phase delay variant of
The switching control means is controllable attenuation means (2, 1; 18, 18,) acting on signals respectively derived from signals (X _front , X _back ) from both the first and second microphone means (Fmic, Bmic). 19), and controllable time or controllable phase delay means (3; 14, 15), wherein said attenuation and phase delay means (1-3; 14, 15, 18, 19) are adjustable attenuation control parameters (Omni) and delay (T) are used to generate the overall composite signal (Y), whereby the overall composite signal (Y) is

As a switch or gradually and between the omnidirectional and any desired form of the directional characteristics with little impact on the phase relationship, time delay and amplitude characteristics of the hearing aid. A hearing aid characterized by switching the hearing aid as a smooth change.