noun
volume; sound level
Refers to the loudness or intensity of sound, commonly used for adjusting audio devices.
テレビの音量を下げてください。
Please turn down the TV volume.
このスピーカーは音量が大きい。
This speaker has high volume.
Compound of 音 (sound) and 量 (quantity, amount), literally 'sound quantity'. A straightforward modern technical term.