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Newbie question: Is 90% for pulse-width the same as 10%?

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tydthomson

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Saturday, February 18th 2012, 6:41pm

Newbie question: Is 90% for pulse-width the same as 10%?

I can't get it to go lower than 50%.

flabberbob

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Saturday, February 18th 2012, 11:02pm

To a human ear - yes. If you flip it upside down and push it so that the 10% part is on the other side, you get the same wave shape. "Flipping" and "pushing" only change the phase of the harmonics that make up the wave shape, but our ear (and brain) cannot tell the difference in phase. It can only detect the amount (relative amplitude) of each harmonic (the best our brain can do is detect some phase difference between two ears, in the upper part of the audible frequency range - that's why we can do with just one subwoofer...).
I'd recommend to read more about the human ear and the perception of sound.

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