Patent ID: 9042584
Filing Date: 2015-05-26
Classification: G10K,H04R

Abstract:
1. A hearing aid system comprising: an analog-to-digital (A/D) converter that converts an analog input signal tone, that is, speaker's voice signals input from a microphone of the hearing aid system into a digital signal; an input buffer memory that stores the digital input signal tone data output from the A/D converter, to then output the stored digital input signal tone data when the number of the stored digital input signal tone data is set as an integer N; a first processor that fast Fourier transforms N input signal tone data output from the input buffer memory, and then executes nonlinear compression, wherein the nonlinear compression is performed by the following process that assuming the value of the amplitude increases in a sequence of the intensities IN a second processor that inverse fast Fourier transforms amplitude spectrum data that has been non-linear compressed and input from the first processor, and then outputs the inverse fast Fourier transformation result; an output buffer memory that stores the voice signal tone data from which feedback noise has been removed from the second processor, until the number of the voice signal tone data is N, to then output the stored voice signal tone data; a digital-to-analog (D/A) converter that converts the digital voice signal tone data from which feedback noise has been removed and that is output from the output buffer memory, into an analog signal, to then output the analog signal to the receiver; and a power supply unit for supplying power to the hearing aid system.