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公开(公告)号:US07092853B2
公开(公告)日:2006-08-15
申请号:US10280565
申请日:2002-10-25
申请人: Robert D. Collier , Douglas A. Fraser , Kenneth Kaliski , G. Ayorkor Mills-Tettey , Efrosyni Seitaridou
发明人: Robert D. Collier , Douglas A. Fraser , Kenneth Kaliski , G. Ayorkor Mills-Tettey , Efrosyni Seitaridou
IPC分类号: G06F7/40
CPC分类号: G01H3/12
摘要: A continuous environmental noise level recording and analysis system is provided. The system is capable of sampling, processing and storing Equivalent Sound Level values over a period of about two weeks. The recorded data is downloaded and analyzed to show graphs, and to automatically detect noise events of interest. The measurement system conforms to ANSI/IEC Type I or Type II standards for noise level monitoring
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公开(公告)号:US3481223A
公开(公告)日:1969-12-02
申请号:US3481223D
申请日:1968-05-22
申请人: DOUGLAS A FRASER
发明人: FRASER DOUGLAS A
CPC分类号: B60W30/18 , B60W10/06 , B60W10/10 , F16H59/0217 , F16H63/18 , F16H63/502 , Y10T477/669
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