Dust collector exhaust noise problem

[Leo Graywacz]

A 3 dB change may represent a 50 % reduction in power, but the human ear hears things differently. It takes approximately a 10 dB change for us to perceive something as being "Twice as loud" or "Half as loud"

This is why hearing protectors with a rating of 30 dB, which represents one one thousandth of the original power, are sometimes required to protect our ears.

If we were to hear in a linear fashion, we would not have the dynamic range required to hear a wisper and then a car horn.

Neal

That is why I rejected the Oneida silencer, 2 dB is almost worthless.

[David Sparks]

John, I have my blower sitting on top of a small barrel wth the exhaust ducted out the window. Because I have the blower hooked up to my scroll saws there isn't much dust. The dust does blow out of the holes in the bottom of the trashcan muffler. The little cutoffs stay in the barrel under the blower. This muffler wouldn't be good if you were running a system that let a lot of dust through.