Review Sheet |
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| wave | vw = ¦ l |
| mechanical | speed of waves in strings/ropes |
| wavelength | longitudinal |
| compression | rarefaction |
| point source | amplitude |
| period (T) | hertz |
| frequency (f) | vibration |
| equilibrium position | wavelength (l) |
| atmospheric pressure | period (T) |
| vibration | frequency (¦) |
| relationship between frequency and wavelength (¦,l) | relationship between frequency and period (¦,T) |
| wave velocity (vw) | standing wave-form for an open water column |
| infrasonic | human range of frequencies |
| radio waves vs sound waves | ultrasonic |
| damped | heat |
| interference | constructive |
| destructive | antinodes |
| reflection | nodes |
| speed of sound (dry air) | speed of sound increases with the medium's rigidity, temperature and humidity |
| forced vibration | natural frequency |
| resonance | fixed-end reflector |
| loops | free-end reflector |
| echo | reverberation |
Formulas |
| vw = f l | T = 1 / f | d = r t | |
| speed of sound in dry air | vw = 331 + 0.6 T | ||
| open-open pipe rods only clamped at their centers |
fn = ( n + 1 ) fo | for the fundamental A-N-A L = 1 loop = ½ l |
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| open-closed pipe | fn = ( 2n + 1 ) fo | for the fundamental A-N L = ½ loop = ¼ l |
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| clamped-clamped wire | fn = ( n + 1 ) fo | for the fundamental N-A-N L = 1 loop = ½ l |