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Class Information
Number: 367/126
Name: Communications, electrical: acoustic wave systems and devices > Distance or direction finding > By combining or comparing signals > Addition or subtraction
Description: Subject matter in which the combined signal is the result of the addition or subtraction of a signal in one channel to or from, respectively, a signal in another channel.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7449967 |
Probabilistic pulse generator and differential absolute value computing element and manhattan distance arithmetic unit using this |
Nov. 11, 2008 |
| 7272073 |
Method and device for generating information relating to the relative position of a set of at least three acoustic transducers |
Sep. 18, 2007 |
| 7149149 |
Acoustic flow noise cancellation using a reference hydrophone |
Dec. 12, 2006 |
| 6861981 |
Normalizing apparatus for adaptive beamforming in smart antenna receiving system |
Mar. 1, 2005 |
| 6559935 |
Sensors of relative position and orientation |
May. 6, 2003 |
| 6370083 |
Method and apparatus for detecting acoustic signals from a plurality of acoustic signal sensors |
Apr. 9, 2002 |
| 6069585 |
Personal direction finding apparatus |
May. 30, 2000 |
| 6002645 |
Self survey of random arrays |
Dec. 14, 1999 |
| 5729507 |
Directional energy receiving systems for use in the indication of the direction of arrival of the received signal |
Mar. 17, 1998 |
| 5675655 |
Sound input apparatus |
Oct. 7, 1997 |
| 5657393 |
Beamed linear array microphone system |
Aug. 12, 1997 |
| 5625697 |
Microphone selection process for use in a multiple microphone voice actuated switching system |
Apr. 29, 1997 |
| 5581036 |
Bandwidth sampling technique for digital focusing in array imaging systems |
Dec. 3, 1996 |
| 5581620 |
Methods and apparatus for adaptive beamforming |
Dec. 3, 1996 |
| 5392213 |
Filter for removal of coherent noise from seismic data |
Feb. 21, 1995 |
| 5333129 |
Acoustic imaging in the ocean using ambinet noise |
Jul. 26, 1994 |
| 5309409 |
Target detection system |
May. 3, 1994 |
| 5272923 |
Inspection apparatus |
Dec. 28, 1993 |
| 5214709 |
Hearing aid for persons with an impaired hearing faculty |
May. 25, 1993 |
| 5208786 |
Multi-channel signal separation |
May. 4, 1993 |
| 5043951 |
Apparatus for reduction of side lobes in a beam pattern of an array |
Aug. 27, 1991 |
| 5034931 |
Display detection enhancement |
Jul. 23, 1991 |
| 5008630 |
Stationary probability integrator system |
Apr. 16, 1991 |
| 4977545 |
Target detector |
Dec. 11, 1990 |
| 4965776 |
Planar end-fire array |
Oct. 23, 1990 |
| 4772445 |
System for determining DC drift and noise level using parity-space validation |
Sep. 20, 1988 |
| 4703506 |
Directional microphone apparatus |
Oct. 27, 1987 |
| 4630246 |
Seismic-acoustic low-flying aircraft detector |
Dec. 16, 1986 |
| 4557386 |
System to measure geometric and electromagnetic characteristics of objects |
Dec. 10, 1985 |
| 4433397 |
Circuit arrangement for the formation and processing of group signals |
Feb. 21, 1984 |
| 4414654 |
Thinned array transducer for sonar |
Nov. 8, 1983 |
| 4360795 |
Detection means |
Nov. 23, 1982 |
| 4336607 |
Beamformer having random access memory delay |
Jun. 22, 1982 |
| 4310904 |
Ambient sea noise elimination method and apparatus |
Jan. 12, 1982 |
| 4247900 |
Signal combiner with permuted addressing |
Jan. 27, 1981 |
| 4241431 |
Sonar ranging system |
Dec. 23, 1980 |
| 4233678 |
Serial phase shift beamformer using charge transfer devices |
Nov. 11, 1980 |
| 4223400 |
Low-frequency directional hydrophone |
Sep. 16, 1980 |
| 4207622 |
Direction-finding array of crossed dipoles |
Jun. 10, 1980 |
| 4203163 |
Target-detection and location system |
May. 13, 1980 |
| 4198705 |
Directional energy receiving systems for use in the automatic indication of the direction of arrival of the received signal |
Apr. 15, 1980 |
| 4180814 |
Multiple beam receiving array signal processor |
Dec. 25, 1979 |
| 4179682 |
Tilt compensation for acoustic transducing system |
Dec. 18, 1979 |
| 4173748 |
Acoustic transducing system |
Nov. 6, 1979 |
| 4170766 |
Beamformer |
Oct. 9, 1979 |
| 4169257 |
Controlling the directivity of a circular array of acoustic sensors |
Sep. 25, 1979 |
| 4119942 |
Acoustic direction finder |
Oct. 10, 1978 |
| 4109232 |
Correction and transmission system for directional target information |
Aug. 22, 1978 |
| 4078222 |
Direction determining apparatus |
Mar. 7, 1978 |
| 4060792 |
Hard clipped beam former |
Nov. 29, 1977 |
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