以前看規格........轉速.......風量......db.....
從AC網站得知.............決定風扇吵不吵是看嚮度的..........

Noise Level
The noise level is measured in Sone (loudness) instead of dB (sound intensity). 噪音標準是測量『宗』(嚮度)來代替分貝(聲音強度)！
The loudness depends upon ears response curves and tells you exactly, how bothering a certain noise is. 在耹聽反應曲線上，響度是可信賴的；它精準的告訴您如何煩惱一個確切噪音！