초록 ▼

A desired acoustic signal is extracted from a noisy environment by generating a signal representative of the desired signal with a processor for a hearing aid device. The processor receives binaural signals from two microphones at different locations. The binaural inputs to the processor are convert

A desired acoustic signal is extracted from a noisy environment by generating a signal representative of the desired signal with a processor for a hearing aid device. The processor receives binaural signals from two microphones at different locations. The binaural inputs to the processor are converted from analog to digital format and then submitted to a discrete Fourier transform process to generate discrete spectral signal representations. The spectral signals are delayed by a number of time intervals in a dual delay line to provide a number of intermediate signals, each corresponding to a different position relative to a desired signal source. Location of the noise source is determined and the spectral content of the desired signal is determined from the intermediate signal corresponding to the noise source location. Inverse transformation of the selected intermediate signal followed by digital to analog conversion provides an output signal representative of the desired signal.

대표청구항 ▼

[ We claim:] [1.]1. A method of signal processing, comprising:(a) detecting an acoustic excitation at both a first location to provide a corresponding first signal and at a second location to provide a corresponding second signal, the excitation being a composite of a desired acoustic signal from a

[ We claim:] [1.]1. A method of signal processing, comprising:(a) detecting an acoustic excitation at both a first location to provide a corresponding first signal and at a second location to provide a corresponding second signal, the excitation being a composite of a desired acoustic signal from a first source and an interfering acoustic signal from a second source spaced apart from the first source;(b) spatially localizing the second source relative to the first source as a function of the first and second signals;(c) generating a characteristic signal representative of the desired acoustic signal during performance of said localizing; andwherein said localizing includes delaying each of the first and second signals by a number of time intervals to provide a number of delayed first signals and a number of delayed second signals, and determining a first time increment representative of separation of the first source from the second source, the characteristic signal being a function of the first time increment.