JOHN E LEVREAULT
Broker in Boxford, MA
License number
Massachusetts 124474
Issued Date
Jan 4, 1991
Expiration Date
Aug 15, 1995
Type
Salesperson
Address
Address
Boxford, MA 01921
Professional information
Remote Turn-On Circuit For Automobile Audio Amplifier
US Patent:
6556683, Apr 29, 2003
Filed:
Jan 7, 1999
Appl. No.:
09/226474
Inventors:
John E. Levreault - Boxford MA 01921
International Classification:
H04B 100
US Classification:
381 86, 381120, 455343, 455345
Abstract:
A system for installing a radio audio amplifier in a vehicle at a location remote from the vehicle radio. The system senses voltage in the radio speaker wires to turn the amplifier on and off.
Active Noise Conditioning System
US Patent:
5848168, Dec 8, 1998
Filed:
Nov 4, 1996
Appl. No.:
8/743334
Inventors:
J. Clay Shipps - Catonsville MD
John E. Levreault - Boxford MA
John E. Levreault - Boxford MA
Assignee:
Tenneco Automotive Inc. - Lake Forest IL
International Classification:
A01F 1106
US Classification:
381 715
Abstract:
An active noise conditioning system for use with a combustion engine exhaust system is provided. A controller receives an exhaust noise signal, along with various other feedback signals for producing an anti-noise signal in response to the input signals. An amplifier is provided for receiving and amplifying the anti-noise signal. A wave generator receives the amplified anti-noise signal and generates an audio anti-noise signal. The output of the wave generator is collocated with the exhaust pipe of the exhaust system, where the audio anti-noise signal and the exhaust noise are acoustically coupled, which effects cancelling of the exhaust noise.