Masking sound device

Details Masking sound device Masking sound device

1988-12-29

1990-04-03

Isen, Forester W.

Electrical audio signal processing systems and devices

Sound or noise masking

A61F 1102

Patent

active

049147064

ABSTRACT:
A masking sound source for a sound masking system has adjustable preset means for adjusting the spectral shape of the sound produced. The source includes a random noise generator for producing white noise and having two incoherent outputs in which two low pass filters having different frequency response characteristics are connected. The filtered noise signals are applied to a potential divider forming a contour control device by which a composite noise signal having the requisite spectral shape is derived. This composite noise signal, after appropriate level adjustment, is applied to an output amplifier.

REFERENCES:
patent: 3980827 (1976-09-01), Sepmeyer et al.
patent: 4010324 (1977-03-01), Jarvis et al.
patent: 4024535 (1977-05-01), Goldstein
patent: 4054751 (1977-10-01), Calder et al.
patent: 4059726 (1977-11-01), Watters et al.
patent: 4319088 (1982-03-01), Orfield
patent: 4348597 (1982-09-01), Weber
patent: 4438526 (1984-03-01), Thomalla
patent: 4476572 (1984-10-01), Horrall et al.
patent: 4674124 (1987-06-01), Horrall et al.
patent: 4691291 (1987-09-01), Wolfram
patent: 4748576 (1988-05-01), Beker et al.
patent: 4771429 (1988-09-01), Davis et al.
An64-11 FIG. 24, National Semiconductor, May 1972.
Ward, Electronic Music Circuit Guidebook, 1975, p. 55.

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