sensitivity

(sĕnˌsĭ-tĭvˈĭ-tē)

1. The quality or condition of being sensitive.
2. The capacity of an organ or organism to respond to stimulation.
3. Electronics The degree of response of a receiver or instrument to an incoming signal or to a change in the incoming signal; the signal strength required by an FM tuner to reduce noise and distortion.
4. The degree of response of a plate or film to light, especially to light of a specified wavelength.