声音 (shēngyīn) means 'sound' or 'voice' and refers to any audible noise, whether from a person, animal, or object. It is the standard general-purpose word for sound in Chinese.
外面传来一阵奇怪的声音。
wàimiàn chuánlái yí zhèn qíguài de shēngyīn.
A strange sound came from outside.
她的声音很好听,适合唱歌。
tā de shēngyīn hěn hǎotīng, shìhé chànggē.
Her voice sounds beautiful and is suited for singing.
请把电视的声音调小一点。
qǐng bǎ diànshì de shēngyīn tiáo xiǎo yìdiǎn.
Please turn the TV volume down a little.