(historical) A project launched by the CIA in the 1960s during the Cold War with the intention to use cats with microphones in their ear canals and small radio transmitters at the bases of their skulls to spy on the Kremlin and Soviet embassies.

plural of acoustic meatus

(anatomy) An internal auditory meatus. / (anatomy) An external acoustic meatus.

A background hum or white noise used to mask other potentially distracting sounds.

Alternative form of nonacoustic

plural of acoustic shock

plural of baryon acoustic oscillation

one of the regular periodic fluctuations in the density of the visible baryonic matter of the universe

A bass guitar meant to be played without electric amplification and as an accompaniment to the acoustic guitar.

plural of acoustic bass guitar