Active-noise-reduction headsets with front-cavity venting

Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Adjacent ear

Reexamination Certificate

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Details

C381S072000, C381S074000

Reexamination Certificate

active

10201540

ABSTRACT:
Active-noise-reduction (ANR) headsets protect the hearing of their users from loud persistent noises, such as airplane engines and construction equipment. These headsets generally include ear speakers and special circuitry to cancel or suppress certain types of loud persistent noises. One problem the present inventor recognized with active headsets, particularly those manufactured in mass quantities, concerns the performance variations that stem from inevitable variations in the fit of their earcups against heads of their users. For example, in putting on and taking off these headsets, some users experience low-pitched noises. Accordingly, the inventor devised, among other things, headsets that include front-cavity vents for equalizing the pressure between a front cavity portion of an earcup and an ambient environment.

REFERENCES:
patent: 3637040 (1972-01-01), Gorman
patent: 4005278 (1977-01-01), Gorike
patent: 4160135 (1979-07-01), Gorike
patent: 4239945 (1980-12-01), Atoji et al.
patent: 4455675 (1984-06-01), Bose et al.
patent: 4922542 (1990-05-01), Sapiejewski
patent: 5020163 (1991-06-01), Aileo et al.
patent: 5182774 (1993-01-01), Bourk
patent: 5590208 (1996-12-01), Koyano et al.
patent: 5604813 (1997-02-01), Evans et al.
patent: 5729605 (1998-03-01), Bobisuthi et al.
patent: 5748749 (1998-05-01), Miller et al.
patent: 5987144 (1999-11-01), Carme et al.
patent: 6041126 (2000-03-01), Terai et al.
patent: 2002/0015501 (2002-02-01), Sapiejewski
patent: 0232096 (1987-08-01), None
“ANR 101 Section 1: The Basics of ANR”,LightSPEED Aviation, Inc., http://www.lightspeed.com,(2000),pp. 1-6.
“ANR 101, A Tutorial on Active Noise Reduction”,LightSPEED Aviation, Inc., http://www.lightspeed.com,(2000),pp. 1-2.
Busch, M. , “AVweb Product Report: LightSPEED Technologies 25XL Active Noise Reduction Headset”, file://C:\TMP\LightSPEED 25XL ANR Headset.htm,(1997),pp. 1-7.

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