To provide a device and method for noise removal which can obtain a stressed voice of superior quality.
The device for noise removal has; an injected noise calculation part 55 which calculates noise to be injected from a deteriorated voice power spectrum and an estimated noise power spectrum; two adders 56 and 57 which add the obtained noise to the deteriorated voice power spectrum and estimated noise power spectrum; and a noise suppression coefficient generation part 8 which determines a suppression coefficient according to the noise-added deteriorated voice power spectrum and estimated noise power spectrum. Further, the device has a windowing processing part 22 which performs windowing processing for a signal sample extracted from two adjacent frames of a reverse Fourier transform output.
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