A medicine or other agent to assist hearing.
The properties or qualities of a room or building that determine how sound is transmitted in it.
Utilizing sound energy in its operation.
(of building materials) Used for soundproofing or modifying sound.
(of an explosive mine or other weapon) Able to be set off by sound waves.
Naturally producing or produced by an instrument without electrical amplification or the need thereof.
A word in the vocative case
The vocative case
Something said to (or as though to) a particular person or thing; an entreaty, an invocation.
Of or pertaining to calling; used in calling or vocation.
Used in address; appellative (said of that case or form of the noun, pronoun, or adjective, in which a person or thing is addressed). For example "Domine, O Lord"