Sound waves are vibrations being passed on between ... A loud sound makes the air move back and forth a lot and so the peaks on the graph are big. A quiet sound makes the air vibrate back and ...

Controlling where sound goes is difficult because of a phenomenon called diffraction – the tendency of sound waves to spread out as they travel. This effect is particularly strong for low-frequency ...

Velocity (and therefore pressure) is greatest mid-way between the maximum displacement of the vibrating body, and we can graph the resulting relationship between amplitude and sound pressure in the ...