The science or study of reflecting sound, or the specific acoustical properties related to sound reflection and echoes.
From Greek 'kata-' (down, back) + 'akoustikos' (relating to sound). This technical term emerged in 19th-century physics and acoustics studies of sound behavior.
When you shout in a canyon and hear your voice echoed back, catacoustics explains why—sound waves are bouncing off rock surfaces at predictable angles, just like light bouncing off a mirror.
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