发明名称 Hearing enhancement and protection device
摘要 A device for providing hearing enhancement and hearing protection. The device includes a means to amplify sounds that do not exceed a specified sound threshold limit. The sound output is restricted to a non-harmful range so that loud, burst full sounds are limited to a safe range and weaker sounds are enhanced for hearing.
申请公布号 US2006233411(A1) 申请公布日期 2006.10.19
申请号 US20060354290 申请日期 2006.02.14
申请人 UTIGARD SHAWN 发明人 UTIGARD SHAWN
分类号 H04R25/00 主分类号 H04R25/00
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