公开(公告)号：EP0639962B1

公开(公告)日：1999-04-14

申请号：EP92911065.8

申请日：1992-04-30

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

Inventor： CLAYBAUGH, Dave ,  DENENBERG, Jeffrey

IPC: A61F11/06 ,  G10K11/16 ,  G10K11/178

CPC classification number: H04R1/1083 ,  A61F2011/145 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/1082 ,  G10K2210/3045 ,  H04R5/033

Abstract: In the area of active noise cancelation headsets, the noisy environment often encountered in the link with communication systems causes lack of intelligibility on the outward communications path. Consequently another in-wire cancellation channel to enhance the intelligibility is required. This additional processing channel adds to the cost of the headset. The invention uses residual microphones (12) to reproduce the sound that remains in the ear after cancelation so that the controller (13) can make further adjustments through filter (15) and LMS adapter (14) to the anti-noise signal.

公开(公告)号：EP0639962A1

公开(公告)日：1995-03-01

申请号：EP92911065.0

申请日：1992-04-30

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

Inventor： CLAYBAUGH, Dave ,  DENENBERG, Jeffrey

IPC: A61F11 ,  G10K11 ,  H04R5

CPC classification number: H04R1/1083 ,  A61F2011/145 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/1082 ,  G10K2210/3045 ,  H04R5/033

Abstract: In the area of active noise cancelation headsets, the noisy environment often encountered in the link with communication systems causes lack of intelligibility on the outward communications path. Consequently another in-wire cancellation channel to enhance the intelligibility is required. This additional processing channel adds to the cost of the headset. The invention uses residual microphones (12) to reproduce the sound that remains in the ear after cancelation so that the controller (13) can make further adjustments through filter (15) and LMS adapter (14) to the anti-noise signal.

公开(公告)号：EP0643881B1

公开(公告)日：1998-12-16

申请号：EP92913700.8

申请日：1992-06-05

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

Inventor： CLAYBAUGH, David ,  DENENBERG, Jeffrey ,  BUSCH, Ralph ,  HOHMAN, John

IPC: H03B29/00 ,  G10K11/16

CPC classification number: G10K11/178 ,  A61F2011/145 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3045 ,  G10K2210/3222

Abstract: An active plus selective headset system for provision of active attenuation of broadband noise as well as speech filtering comprising a headset (11) with reference microphones (14), residual microphones (13) and speakers (12) on each of a pair of open backed muffs (21, 22) and a controller (20).

公开(公告)号：EP0643881A1

公开(公告)日：1995-03-22

申请号：EP92913700.0

申请日：1992-06-05

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

Inventor： CLAYBAUGH, David ,  DENENBERG, Jeffrey ,  BUSCH, Ralph ,  HOHMAN, John

IPC: A61F11 ,  G10K11 ,  H03B29

CPC classification number: G10K11/178 ,  A61F2011/145 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3045 ,  G10K2210/3222

Abstract: An active plus selective headset system for provision of active attenuation of broadband noise as well as speech filtering comprising a headset (11) with reference microphones (14), residual microphones (13) and speakers (12) on each of a pair of open backed muffs (21, 22) and a controller (20).