Electrical audio signal processing systems and devices – Sound or noise masking
Patent
1985-05-17
1987-08-11
Rubinson, Gene Z.
Electrical audio signal processing systems and devices
Sound or noise masking
H04R 300
Patent
active
046866930
ABSTRACT:
A sound masking apparatus especially useful for setting background noise levels in discrete zones includes a signal source, power amplifier, programmable attenuator and remote control. The remote control is a short range radio transmitter that sends a series of pulses that are decoded to control the attenuator. The attenuator selects among discrete possible volume levels using serially-connected analog multiplexers, the multiplexer-selected lines connecting the signal to a desired part of a resistor network defining voltage dividers. The short range radio control makes a single remote controller operable to control volume levels in any zone of a multiple zone installation without direct access to the signal source, whereby the user can change volume levels in small increments to accomodate changing conditions or preferences and to slowly bring sound masking units to full volume levels.
REFERENCES:
patent: 3213851 (1965-10-01), Currea
patent: 3406344 (1968-10-01), Hopper
patent: 3701946 (1972-10-01), Anderson
patent: 3814856 (1974-06-01), Dugan
patent: 3980827 (1976-09-01), Sepmeyer 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: 4080602 (1978-03-01), Hattori
patent: 4082918 (1978-04-01), Chang et al.
patent: 4185167 (1980-01-01), Cunningham
patent: 4189713 (1980-02-01), Duffy
patent: 4228402 (1980-10-01), Plummer
patent: 4280019 (1981-07-01), Propst et al.
patent: 4413261 (1983-11-01), Greenberg
patent: 4423289 (1983-12-01), Swinbanks
patent: 4438526 (1984-03-01), Thomalla
patent: 4473906 (1984-09-01), Warnaka et al.
patent: 4476572 (1984-10-01), Horrall et al.
patent: 4550400 (1985-10-01), Henderson, Jr.
Rubinson Gene Z.
Schroeder L. C.
Sound Mist, Inc.
LandOfFree
Remotely controlled sound mask does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Remotely controlled sound mask, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Remotely controlled sound mask will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-407665