发明名称 Dummy-head stereo system - has free-field matching filter coupled to each dummy-head microphone to obtain frequency-independent response to initial sound front
摘要 <p>The stereo system uses a dummy-head and headphones. The dummy-head has a microphone on either side exhibiting resonance in the range between 5 and 12 KHz, both microphones being coupled to a filter with a frequency characteristic which is the inverse of the microphone free-field transmission for the initial sound front. The microphone signals are subsequently supplied to a recording circuit with the corresp. reproduction circuit, coupled to headphones matching the stereo programme signals for the latter. Pref. capacitor or electret microphones are used, with a passive blocking filter, or a passband filter and the blocking filters being used.. The system allows the signals from the dummy-head to be made compatible with the specific headphones.</p>
申请公布号 DE3001007(A1) 申请公布日期 1981.10.29
申请号 DE19803001007 申请日期 1980.01.12
申请人 INSTITUT FUER RUNDFUNKTECHNIK GMBH 发明人 OELMANN,JUERGEN,DR.-ING.
分类号 H04R5/027;H04S1/00;(IPC1-7):04S5/00;04R5/00 主分类号 H04R5/027
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