Noise
Fans generate noise from the rapid flow of air around blades and obstacles, and sometimes from the motor. Fan noise has been found to be roughly proportional to the fifth power of fan speed; halving speed reduces noise by about 15dB.
Read more about this topic: Mechanical Fan
Famous quotes containing the word noise:
“I will not by the noise of bloody wars and the dethroning of kings advance you to glory: but by the gentle ways of peace and love.”
—Thomas Traherne (1636–1674)
“Sing unto the Lordwith the harp, with the harp, and the voice of a
psalm.
With trumpets and sound of cornet make a joyful noise before the Lord,”
—Bible: Hebrew Psalm XCVIII (l. XCVIII, 5–6)
“It is as real
as splinters stuck in your ear. The noise we steal
is half a bell. And outside cars whisk by on the suburban street
and are there and are true.
What else is this, this intricate shape of air?
calling me, calling you.”
—Anne Sexton (1928–1974)