청각으로 느끼는 음의 주관적인 크기를 나타내는 단위로, 1,000Hz의 주파수에서 40데시벨인 음의 크기를 1손(sone)으로 정의한다.
A unit of subjective loudness, defined as the loudness of a 1,000 Hz tone at 40 decibels above the listener's threshold of hearing.
예문:
"The perceived loudness of the new ventilation system was rated at approximately four sones."
"Because the sone scale is linear, a sound of two sones is twice as loud as a sound of one sone."