Sensitivity (electronics)
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The sensitivity of an electronic device, such as a communications system receiver, or detection device, such as a PIN diode, is the minimum magnitude of input signal required to produce a specified output signal having a specified signal-to-noise ratio, or other specified criteria.
Sensitivity is sometimes improperly used as a synonym for responsivity.
- Microphones
- The sensitivity of a microphone is usually expressed as the sound field strength in decibels (dB) relative to 1 V/Pa (Pa = N/m2) or as the transfer factor in millivolts per pascal (mV/Pa) into an open circuit or into a 1 kiloohm load.
- Loudspeakers
- The sensitivity of a loudspeaker is usually expressed as dB / 2.83 VRMS at 1 meter. This is not the same as the electrical efficiency; see Efficiency vs Sensitivity.
- Hydrophones
- The sensitivity of a hydrophone is usually expressed as dB re 1 V/µPa.
[edit] References
This article contains material from the Federal Standard 1037C (in support of MIL-STD-188), which, as a work of the United States Government, is in the public domain.
