发明名称 Omnidirectional sympathetically driven sound reproduction device
摘要 A sound reproduction device formed of an enclosure of expanded or foamed polymeric material, preferably polystyrene, which houses a centrally suspended speaker system, preferably a wafer multi-range speaker system. The enclosure is substantially closed and is acoustically excited by the speaker system to propagate sound thus requiring only a small ventilation opening to permit movement of the enclosure walls.
申请公布号 US4010821(A) 申请公布日期 1977.03.08
申请号 US19750574166 申请日期 1975.05.02
申请人 QUILLMANN, LEO-HEINZ 发明人 QUILLMANN, LEO-HEINZ
分类号 H04R1/02;H04R1/32;(IPC1-7):H04R1/02 主分类号 H04R1/02
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