A noise suppressor device capable of attaining perceptually preferable noise suppression while reducing or minimizing quality reduceabilities even in the presence of increased noises, which device is adaptable for use in voice communications systems and speech recognition systems employed in a variety of kinds of noisy environments is provided. To attain the object the device is arranged to include a time-to-frequency converter unit 2, a noise similarity analyzer unit 3, an average noise spectrum updating and holding unit 4, a perceptual weight calculator unit 6, a signal-to-noise (SN) ratio calculator unit 5, a perceptual weight control unit 7, a spectrum subtractor unit 8, a spectrum suppression unit 9, and a frequency/time converter unit 10. |