sone
US /soʊn/
UK /səʊn/
名詞
宋
a unit of perceived loudness, equal to the loudness of a 1000-hertz tone at 40 decibels above the listener's threshold of hearing
範例:
•
The sound level was measured at 50 sones.
聲級測量為50宋。
•
This new fan operates at a very low sone level, making it quiet.
這款新風扇以非常低的宋級運行，使其安靜。