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:
“The noise of life begins again,
And ghastly through the drizzling rain
On the bald street breaks the blank day.”
—Alfred Tennyson (1809–1892)
“And its noise as the noise in a dream; and its depth as the roots
of the sea:”
—A.C. (Algernon Charles)
“I throw myself down in my chamber, and I call in, and invite God, and his Angels thither, and when they are there, I neglect God and his Angels, for the noise of a fly, for the rattling of a coach, for the whining of a door.”
—John Donne (c. 1572–1631)