发明名称 Sound muffler for covering the mouth
摘要 A human sound muffler and indicator for placement around the mouth of a user to absorb most of the sound emanating from the user's mouth including a microphone and associated electrical circuit for receiving unabsorbed sound and providing an indication of the intensity of the unabsorbed sound.
申请公布号 US4834212(A) 申请公布日期 1989.05.30
申请号 US19870032034 申请日期 1987.03.30
申请人 FIGONE, MOIRA J.;FIGONE, FRANK M. 发明人 FIGONE, MOIRA J.;FIGONE, FRANK M.
分类号 G10K11/16;H04R1/14 主分类号 G10K11/16
代理机构 代理人
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