a. pertaining to the hearing, to sound and its transmission; worked by sound or echoes. acoustician, n. expert in acoustics. acoustics, n. science of sound laws; properties of audibility of a building.
Black and red recall the tunics worn by soldiers during the Napoleonic wars. Gold was added to create a flag similar to the French tricolour, a symbol of revolution. Effective date: 23 May 1949.