These levels depend on many factors, including the sound source loudness, distance from the microphone to sound source, microphone sensitivity, gain applied to microphone signal, and other factors. Mixing consoles and digital audio workstations are examples of professional equipment.īoth mic and line levels have nominal values of just average. Professional audio equipment can only work with electric signals at line level (nominally +4 dBu). Mic level is usually specified between a nominal 60 dBu or -40 dBu. Mic level signal is what microphones produce. Digital gain is simply a multiplication or addition of the digitalized value, which results in a loss in resolution. +6 dB effectively doubles the voltage, and -6 dB effectively halves it.Īlthough microphones are analog, they can output digital signals in certain cases. They are measured in decibels relative voltage (both are measured in dBu and dBV).ĭecibels can be described as a logarithmic ratio. Let’s begin our discussion by reviewing some basic information about audio signals.Īn analog audio signal is an electronic signal. 8 Conclusion What is Microphone Gain and How Does it Affect Mic Signals.5 Why don’t the microphone output line level?. 4 So, How does the Microphone Gain affect Microphone Signals?.1.5 Gain From A Separate Microphone Preamplifier.1.4 Gain From An Active Preamplifiers In USB/Digital Microphones.1.3 Gain From An Active Preamplifier Within The Microphone.1 What is Microphone Gain and How Does it Affect Mic Signals.
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