Ear:
sound has an intensity measured in w/m2 which leads to the decibel scale (intensity level)
there also a relative intensity level allowing you to compare two sounds directly
Doppler, Fourier, Lissajous, Chladni, Mach, Bell
Mach # = v source / v wave | Doppler Effect | M# > 1 sonic boom, shock wave, (water - bow wave) |
Lissajous patterns: the interference of two waves moving perpendicularly to each other allowing an unknown frequency to compared to a known frequency
1-1 |
4-3 |
Resonances:
Fourier: Complex waves can be simplified to a series of sine waves
last modified 02-21-05