responsivity
Noun
Meaning
A measure of responsiveness
(physics) A measure of the gain of a system
Source: en.wiktionary.orgSynonyms
Examples
For a system that responds linearly to its input, there is a unique responsivity.
From this metric noise-equivalent power can be computed by taking the noise level over the responsivity.
Furthermore, the term gain is also applied in systems such as sensors where the input and output have different units; in such cases the gain units must be specified, as in "5 microvolts per photon" for the responsivity of a photosensor.
In this case, responsivity summarizes the change in the neural response per unit signal strength.
The broad-band responsivity, is then just the signal weighted by this wattage.
The responsivity in these applications can have a variety of units.