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1. (US5233137) Protective anc loudspeaker membrane

المكتب : الولايات المتحدة الأمريكية
رقم الطلب: 07895502 تاريخ الطلب: 08.06.1992
رقم النشر: 5233137 تاريخ النشر: 03.08.1993
رقم التسليم: 5233137 تاريخ التسليم: 03.08.1993
نوع النشر: A
التصنيف الدولي للبراءات:
F01N 1/06
G10K 11/00
G10K 11/178
Description not available in lang arDescription not available in lang arDescription not available in lang ar
التصنيف التعاوني للبراءات:
F01N 13/16
F01N 1/065
F01N 1/22
G10K 11/178
G10K 2210/112
G10K 2210/12822
G10K 2210/3045
G10K 2210/32272
مودعي الطلبات: Ford Motor Company
المخترعون: Geddes Earl R.
الوكلاء: May Roger L.
Mollon Mark L.
بيانات الأولوية: 07514624 25.04.1990 US
الاسم: (EN) Protective anc loudspeaker membrane
الملخص: front page image
(EN)

A transducer arrangement for active noise cancellation signals provides an acoustically permeable membrane between ports in direct communication with the noise propagating conduit and the transducers delivering sound pulses to the port. A housing defines at least one chamber exposed to at least one face of a transducer diaphragm, and each chamber is connected in fluid communication with the conduit through at least one port. The chamber is partitioned by the membrane to include chamber portions with a predetermined volumetric relationship. In a preferred embodiment where the transducer arrangement is coupled to a motor vehicle exhaust conduit, the membrane is preferably a silicone impregnated polyurethane film reinforced with aromatic polyamide fibers. Such a member provides a waterproof, acoustically permeable partition between the port and any adjacent speaker face that can withstand high temperatures. In a two transducer arrangement, two diaphragm faces are exposed to a common chamber including two membranes positioned on opposite sides of the port communicating with the chamber.


Also published as:
EP0454341US5319165