Masking noise generator

Details Masking noise generator Masking noise generator

1976-03-01

1977-10-18

Birmiel, Howard A.

Oscillators

Relaxation oscillators

179 1AA, 179 1P, 331 78, H04R 300

Patent

active

040547515

ABSTRACT:
There is disclosed a masking noise generator which includes a digital means such as a shift register for generating noise signals wherein the output of the shift register is fed via a filtering means to a transducer means such as a speaker for converting the noise signals to acoustic waves.

REFERENCES:
patent: 3213199 (1965-10-01), Snow
patent: 3567863 (1971-03-01), Morrissey
patent: 3614399 (1971-10-01), Linz
patent: 3681708 (1972-08-01), Olmstead
patent: 3885139 (1975-05-01), Hurd
patent: 3980827 (1976-09-01), Sepmeyer et al.
patent: 4024535 (1977-05-01), Goldstein
"Speech Privacy in Buildings", Cavanaugh, Journal of the Acoustical Society of America, vol. 34, No. 4, Apr. 1962, pp. 475-492.
"A Low Frequency Pseudo-Random Noise Generator", Kramer, Electronic Engineering, July 1965, pp. 465-467.
A Hybrid Analog-Digital Pseudo Random Noise Generator", Hampton, Proceedings-Spring Joint Computer Conference, 1964, pp. 287-297.

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