125 dB SPL/V换算成标准灵敏度是多少

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http://broadcastengineering.com/newsrooms/broadcasting_analog_audio_noise/

        

Table   1. Open load SNR at dynamic microphone output

            

SPL   (dB)

         

Microphone   output voltage (μV)

         

SNR   (dB)

           120
      20,000.00
      99.21
        74
      100.00
      53.19
        61
      22.40
      40.19
        34
      1.00
      13.19
   

http://www.akg.com/site/service_glossary/powerslave,id,53,nodeid,9,_language,EN.html

Sensitivity  (dB/mW)

The sound pressure level that each  speaker generates when driven by a signal with a power of 1 mW. The  sensitivity is usually stated for a 1-kHz signal.   At the usual maximum power rating of 200 mW for a pair of headphones, the  resulting sound pressure level will be 23 dB higher than the sensitivity,  which would be equivalent to approx. 124 dB for the AKG K 141 Studio!   Warning: Listening at high sound  pressure levels may damage your hearing.

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SPL(dB)	Microphone output voltage (μV)	SNR(dB)
120	20,000,00	99.21
74	100,00	53.19
61	22.40	40.19
34	1.00	13.19