Although often employed interchangeably with ACOUSTICS, the term might better be restricted to the technology dealing with the practical applications of SOUND, as distinct from the pure science of acoustics. (It will be noted, however, that the contemporary acoustical engineer or acoustician is often mostly involved with the practical applications of sound.)

The term 'sonics' has come to be used in the United States for those aspects of acoustics not directly associated with the hearing process, as in ULTRASONIC and INFRASONIC sound. See: SONIC.