ボイスboisu

1. nounvoice

• Synonym声こえNeutralNeutral and the most common word of all: the voices of people or animals, and also opinions or wishes, as in 「市民の声」; 「ボイス」 mostly appears in compounds.
• Synonym音声おんせいNeutralNeutral: sound or audio, such as the sound of a TV or 「音声案内」; frequent in technical and equipment descriptions. The two often translate each other, but 「音声」 is broader.
• Related発声はっせいWrittenA written/formal term for the act of producing a voice, or for leading off a group shout or song, as in 「発声練習」; unlike 「ボイス」, it names the act, not the sound.
• Related声音せいおんWrittenA written/formal word for the human voice, also vocal music; rare even in writing. Everyday speech takes 「声」, and compounds prefer 「ボイス」.
• Antonym無言むごんWrittenWritten/formal, read しじま, also written 「沈黙」「無言」: stresses the silence of holding one's tongue; a poetic, literary term, opposite to 「ボイス」.
• AntonymしじまWrittenA written/formal word, read しじま: a state of utter stillness in which every sound has died away; archaic and literary, it stands opposite the voiced 「ボイス」.

For everyday voice or sound, say 「声」; 「ボイス」 appears mainly in loanword compounds like 「ボイスメッセージ」. For audio and speech sound, use 「音声」; for the opposite, deep quiet, use 「静寂」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 音声おんせい、音おと。
2. 動詞どうしの態たい。