公开(公告)号：US3644674A

公开(公告)日：1972-02-22

申请号：US3644674D

申请日：1969-06-30

Applicant: BELL TELEPHONE LABOR INC

Inventor： MITCHELL OLGA M M ,  ROSS CAROLYN ,  WALLACE ROBERT L JR

IPC: G10K11/178 ,  H04M9/00 ,  H04R3/00 ,  H04B15/00

CPC classification number: H04R3/005 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/1082 ,  G10K2210/111 ,  G10K2210/3012 ,  G10K2210/3045 ,  H04M9/001

Abstract: Signals from a desired source, such as a person speaking, are enhanced relative to unwanted ambient sound by a speech processor that includes an array of microphones arranged at equal distances from the desired source. The unwanted sound, being ''''off-center, '''' arrives nonconcurrently at the individual microphones. The processor continuously arranges the instantaneous microphone outputs in order of their relative energy contained, and selects as its output some one of the microphone outputs that is intermediate in the instantaneous ranking.