5546467 : Active noise attenuated DSP Unit
INVENTORS: Denenberg; Jeffrey N., Trumbull, CT
ASSIGNEES: Noise Cancellation Technologies, Inc., Linthicum, MD
ISSUED: Aug. 13, 1996   FILED: Mar. 14, 1994
SERIAL NUMBER: 212580   MAINT. STATUS:
INTL. CLASS (Ed.  6): A61F 11/06; H03B 29/00;
U.S. CLASS: 381-071; 381-094; 340-310.01; 340-310.03; 340-310.06;
FIELD OF SEARCH: 381-71,94,73.1 ; 340-310.01,310.02,310.06,310.04 ; 379-66,442,444 ;
AGENTS: Hiney; James W.;

ABSTRACT:   An active noise control system for controlling multiple home appliances and including a power distribution network by which many appliances can be quieted by remotely processing noise signal information and forwarding noise cancelling signals to the appliances through the distribution network.

U.S. REFERENCES:   (No patents reference this one)
Patent No. Inventor Issued Title
3876984 Chertok 4 /1975 APPARATUS FOR UTILIZING AN A.C. POWER LINE TO COUPLE A REMOTE TERMINAL TO A CENTRAL COMPUTER IN A COMMUNICATION SYSTEM
4200862 Campbell et al. 4 /1980 Appliance control
4418333 Schwarzbach et al. 11 /1983 Appliance control system
4988972 Takagi 1 /1991 Method for transmitting and receiving signals over transmission power lines
5018202 Takahashi et al. 5 /1991 Electronic noise attenuation system
5051720 Kittirutsunetorn 9 /1991 Remote control system using power line of remote site
5066939 Mansfield, Jr. 11 /1991 Method and means of operating a power line carrier communication system
5105377 Ziegler, Jr. 4 /1992 Digital virtual earth active cancellation system
5129003 Saruta 7 /1992 Active noise control apparatus for domestic appliance
5375174 Denenberg 12 /1994 Remote siren headset

EXEMPLARY CLAIM(s): Show all 8 claims

I claim:
  • 1. An active control system adapted to provide control to at least one house appliance to be quieted through the power connection, said system comprising
    • an active noise control means associated with a power distribution network,
    • at least one appliance means to be quieted, and
    • a power connection means comprising a dual frequency modulation means between said control means and said appliance means adapted to convey noise control signals from said control means to said appliance means and a residual noise signal from said appliance back to said control means.

RELATED U.S. APPLICATIONS: none

FOREIGN APPLICATION PRIORITY DATA: none
FOREIGN REFERENCES: none

OTHER REFERENCES:

  • M. S. Roden, "Digital Communication Systems Designs," Sections 5.6-5.9, 12.1 (1988).
PRIMARY/ASSISTANT EXAMINERS: Isen; Forester W.; Mei; Xu
ADDED TO DATABASE: Sep. 1 , 1996