发明名称 Electro-acoustical transducer and transducer assembly
摘要 <p>An electro-acoustical transducer comprising DC atmospheric pressure equalization vents (50) for equalizing pressure in both chambers therein. The sound port of the transducer may be sealed by a sound conducting member preventing gas flow there through. The transducer may have a single vent extending in a plane of a side portion, which vent may have a meandering path (46) or may comprise tapering portions or cavities defining acoustical properties thereof. </p>
申请公布号 EP1653767(A3) 申请公布日期 2008.11.19
申请号 EP20050023742 申请日期 2005.10.31
申请人 SONION NEDERLAND B.V. 发明人 VAN HALTEREN, AART ZEGER;BEEKMAN, NIELS
分类号 H04R1/22 主分类号 H04R1/22
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