Susan W. Christensen - Tuxedo Park NY Cecil H. Coker - Chatham NJ
Assignee:
Bell Telephone Laboratories, Incorporated - Murray Hill NJ
International Classification:
H04B 1500
US Classification:
179 1P
Abstract:
A circuit for reducing reverberative interference utilizes a pair of spatially separated microphones to obtain speech signals from a common sound source. Each speech signal is transformed into an envelope representative signal having rapid increases responsive to direct path and echo energy bursts from the sound source and exponential decaying portions between energy bursts. A first pulse corresponding to a sound source direct path energy burst is generated responsive to the first speech signal exceeding its envelope representative signal, and further first pulses corresponding to echo bursts are inhibited for a predetermined time. A second pulse corresponding to said sound source direct path energy burst is generated responsive to the second speech signal exceeding its envelope representative signal, and further second pulses corresponding to echo bursts are inhibited for a predetermined time. The first and second speech signals are aligned in phase responsive to the time difference between said first and second pulses. Three embodiments are disclosed: phase alignment by electronic delay adjustment using a pair of microphones or using vertical arrays of microphones, and phase alignment by feedback servo control of a rotatable microphone array.
License Records
Susan J Christensen
License #:
273650-1101 - Expired
Category:
Cosmetology
Issued Date:
Apr 21, 1994
Expiration Date:
Sep 30, 2001
Type:
Cosmetologist / Barber
Susan Christine Christensen
License #:
E-5598 - Expired
Category:
Engineering Intern
Susan Marie Christensen
License #:
31436 - Active
Category:
Cosmetology
Issued Date:
Mar 1, 1982
Effective Date:
Mar 1, 1982
Expiration Date:
Dec 31, 2018
Type:
Cosmetologist
Susan Alice Christensen Dds
License #:
4942 - Active
Category:
Dentistry
Issued Date:
May 21, 1981
Effective Date:
May 21, 1981
Expiration Date:
Mar 1, 2019
Type:
Dentist
Susan Alice Christensen Dds
License #:
182 - Active
Category:
Dentistry
Issued Date:
Oct 3, 2016
Effective Date:
Oct 3, 2016
Expiration Date:
Mar 1, 2019
Type:
Minimal Sedation Permit
Name / Title
Company / Classification
Phones & Addresses
Susan F. Christensen Manager
RIMBY SOLAR LLC
Susan Christensen Local Advertising Salesmanager
Time Warner Cable Programming Inc. Telephone Communications, Exce