I'm trying to grasp how pulse waves work. I know that a pulse wave with a duty cycle of 50% is basically a square wave. I read the following on this website:
"Of course, there's nothing stopping us from generating pulse waves with any other duty cycle we please, from 0% (where the wave is permanently rooted to the bottom of the cycle, and is therefore silent) to 100% (where it is rooted to the top of the cycle, and again silent)."
I'm confused. I was initially thinking that sound could be heard from a pulse wave when the wave was rooted to the positive portion of the cycle. What portion of the cycle generates the sound if what they say is true? Help!