Physics

Acoustics and sound

Sound propagation, echoes, sound level, Doppler effect and beats.

Physics

Sound travel distance

s = vt→
Physics

Echo distance

s = vt / 2→
Physics

Sound wave speed

v = λν→
Physics

Sound level from intensity

L = 10 log₁₀(I/I₀)→
Physics

Doppler effect for moving source

ν′ = νv/(v−u)→
Physics

Beat frequency

fbeat = |f₁−f₂|→