The way sounds function within a given language; a phonological system.
The study of the way sounds function in languages, including phonemes, syllable structure, stress, accent, intonation, and which sounds are distinctive units within a language.
An electronic voice-amplification apparatus, usually containing a set of two loudspeakers and a central control unit, used for singing, giving a speech, play-by-play commentary at events, or broadcasting in public areas like in airports or stations.