acoustic reciprocity theorem

acoustic reciprocity theorem

[ə′küs·tik ‚res·ə′präs·əd·ē ‚thir·əm]
(acoustics)
A theorem which states that in the acoustic field due to a sound source at point A, the sound pressure received at any other point B is the same as that which would be produced at A if the source were placed at B, and that this can be generalized for multiple sources and receivers.