Pertaining to the sense of hearing, the organs of hearing, or the science of sounds; auditory. Acoustic duct, the auditory duct, or external passage of the ear. Acoustic telegraph, a telegraph making audible signals; a telephone. Acoustic vessels, brazen tubes or vessels, shaped like a bell, used in ancient theaters to propel the voices of the actors, so as to render them audible to a great distance.
a medicine or agent to assist hearing. A remedy for hearing loss or deafness.Of or relating to the science of acoustics; acoustic properties of a hall.Pertaining to the hearing capabilities of animals.