In this way, the wave makes its way down the pipe much faster than the actual gases do. When these pressure pulses reach your ear, the eardrum vibrates back and forth. Our brain interprets this motion as sound. A higher wave frequency simply means that the air pressure fluctuates faster. The faster an engine runs, the higher the pitch we hear.
Slower fluctuations sound like a lower pitch.
The wave's amplitude determines how loud the sound is. Sound waves with greater amplitudes move our eardrums more, and we register this sensation as a higher volume. It turns out that it is possible to add two or more soundwaves together and get less sound. Let's see how. Inc. All rights reserved.