Meanings

voice

phonetic symbol

(study of) acoustics

looking up a word or kanji by its reading (rather than by its radical or stroke count)

phonetic transcription

sound effects

classical music

spoken language

acoustic training

in a clear voice

present (to build up a "friendship" with someone)

phonology

homophony (having the same pronunciation as another word but a different meaning)

simultaneous recording (of image and sound)

the sound of gunfire

sound of a word

mediant

euphonic change of pronunciation

soundproofing (device)

phonetic value