首页>
外国专利>
Hearing aid with proportional frequency compression and shifting of audio signals
Hearing aid with proportional frequency compression and shifting of audio signals
展开▼
机译:具有比例频率压缩和音频信号移位的助听器
展开▼
页面导航
摘要
著录项
相似文献
摘要
Apparatus and methods for audio compression and frequency shifting retain the spectral shape of an audio input signal while compressing and shifting its frequency. The fast Fourier transform of the input signal is generated, to allow processing in the frequency domain. The input audio signal is divided into small time segments, and each is subjected to frequency analysis. Frequency processing includes compression and optional frequency shifting. The inverse fast Fourier transform function is performed on the compressed and frequency shifted spectrum, to compose an output audio signal, equal in duration to the original signal. The output signal is then provided to the listener with appropriate amplification to insure audible speech across the usable frequency range.
展开▼