PhysicsLAB: Chapter 26: Sound

wave	v_w = fλ
mechanical	non-mechanical
longitudinal	radio waves vs sound waves
damped	heat
compression	rarefaction
amplitude (pressure/density)	point source
frequency (f)	hertz
kilohertz	megahertz
vibration	period (T)
equilibrium position	wavelength (λ)
relationship between frequency and wavelength	relationship between frequency and period
human range of frequencies	infrasonic
ultrasonic	intensity, decibels
interference	beats
beat pitch	beat frequency
constructive	destructive
antinodes (A)	nodes (N)
loops	resonance
forced vibration	natural frequency
properties of open pipes	properties of closed pipes
harmonics	overtones
standing waveform for an open water column	reflection
echo	reverberation
speed of sound (dry air)	speed of sound increases with the medium's rigidity, temperature, humidity

Formulas

v_w = fλ	d = rt
sound level	dB to power take the difference in the decibels, divide that difference by 10, relationship between the original sound levels equals 10^x power
beats	beat frequency = \|f₂ - f₁\| beat pitch = ½(f₁ + f₂)
speed of sound in dry air	v_w = 331 + 0.6T
open-closed pipe	for the fundamental, A-N L_pipe = ½ loop = ¼λ
open-open pipe	for the fundamental, A-N-A L_pipe = 1 loop = ½λ