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专利名称：TELEPHONE HANDSET发明人：PETERSEN, HOLGER申请号：EP00909035.8申请日：20000217公开号：EP1153500A1公开日：20011114
摘要：The aim of the invention is to improve the directional characteristic ofminiaturised telephone handsets. The microphone (2) is provided with a unidirectionaldirectional characteristic and is arranged on the front side of the telephone handset (1) insuch a way that the main sound input (3) of the microphone (2) terminates on the samelevel as the lower side pertaining to said telephone handset and that the rear
compensating opening of the microphone terminates on the same level as the front sidepertaining to the telephone handset. The main sound entrance is damped whereas thecompensating opening is not.
申请人：SIEMENS AKTIENGESELLSCHAFT
地址：Wittelsbacherplatz 2 80333 München DE
国籍：DE
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