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Many tradeoffs are required in the design of microphone preamplifier circuits. Characteristics such as noise figure, stability, bandwidth, and complexity may be dependent upon the gain of the design. Three factors determine the gain required from a microphone preamp: Sound-pressure level of the sound source, distance of the microphone from that sound source (within the critical distance), and sensitivity of the microphone. This paper is an effort to find a probability distribution of the gain settings used with professional microphones. This is done by finding the distribution of max SPL in real use, and by finding the sensitivity of the most commonly used current and classic microphones.
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 Ask Kaereby |
Comment posted March 15, 2011 @ 11:05:19 UTC
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Interesting and good work on finding the necessary standard gain range - could you provide pointers to where the results may be found? (Respond to this comment)
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Bob Olhsson |
Comment posted February 23, 2015 @ 15:19:55 UTC
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I keep coming back to a 40 dB. first stage followed by a second 40 dB. stage with an attenuator in between which was common in the late 1940s. That was back when audio design engineers came out of MIT. |
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