(1) The minimum required signal at the input of an audio device in order to produce the rated output is generally called the sensitivity of the device. The higher the sensitivity, the lower the signal required at the input. A device with high sensitivity can process very small signals, but may be distorted by large ones, whereas one with low sensitivity can process large signals without distortion, but may add an unacceptable level of noise to a small signal.
(2) In general, all information about a transducer’s response characteristics to incoming sound waves. With respect to microphones, a standard performance specification that indicates the output voltage generated when a sound of known SPL and frequency arrives at the diaphragm. Given in mV by most manufacturers, and generally specified for broadband response to pink noise. See efficiency, transfer characteristic.
(3) See velocity sensitivity.