Method and apparatus evaluating auditory distortions of an audio

Details Method and apparatus evaluating auditory distortions of an audio Method and apparatus evaluating auditory distortions of an audio

1985-09-04

1987-11-10

Isen, Forester W.

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

73646, 381 98, H04R 2900

Patent

active

047062908

ABSTRACT:
Method and apparatus for evaluating the auditory distortion of an audio system, wherein an audio signal, whose auditory distortions are to be evaluated, is filtered by a notch filter to remove its fundamental frequency, and is then fed through a primary weighting network comprising three high pass filters followed by a secondary weighting network. The filtered, weighted signal is then amplified, recitified, further filtered, compared by taking the ratio with the magnitude of original signal and finally fed to a display unit to sow a figure that represents auditory distortion characteristics consistent with what is actually perceived by human auditory faculties.

REFERENCES:
patent: 3594506 (1971-07-01), Bauer et al.
patent: 3696206 (1972-10-01), Ida et al.
patent: 4307385 (1981-12-01), Evans et al.

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