D defs.my
Entry 1 sense Webster, 1913

Diacoustics

· Di·a·cous·tics · IPA
01 n. That branch of natural philosophy which treats of the properties of sound as affected by passing through different mediums; -- called also …
  1. 1.
    That branch of natural philosophy which treats of the properties of sound as affected by passing through different mediums; -- called also diaphonics. See the Note under Acoustics. Also: diaphonics See: Acoustics