Electrical audio signal processing systems and devices – Monitoring/measuring of audio devices – Loudspeaker operation
Patent
1986-11-20
1989-05-23
Miska, Vit W.
Electrical audio signal processing systems and devices
Monitoring/measuring of audio devices
Loudspeaker operation
324 77B, G10L 902, G10R 2316
Patent
active
048337170
ABSTRACT:
A voice spectrum analyzing method and system subjects a voice signal to frequency analysis by passing the voice signal through a filter bank containing a plurality of band pass filters each having a different band pass filter range to produce a voice spectral pattern over a predetermined frequency range. The voice spectral pattern is sampled at a predetermined sampling time interval successively, and each of the sampled voice spectral patterns is stored for a predetermined time period. While the voice spectral pattern is retained, it is scanned once in a predetermined time sequence, thereby forming an approximate periodic signal from a series of the scanned voice spectral voice patterns. And the periodic signal thus formed is then digitized and filtered through a digital high pass filter, thereby obtaining a high frequency component from the periodic signal which indicates a feature parameter of the voice signal.
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patent: 4640134 (1987-02-01), Simmons
Nakamura Shogo
Nakatani Tomofumi
Miska Vit W.
Ricoh & Company, Ltd.
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