| A | B |
|---|
| pitch | the property of sound as measured by frequency |
| loudness | the property of sound as measured by energy(amplitude) |
| hertz | unit of measure for frequency |
| decibel | unit of measure for loudness |
| doppler effect | the apparent change in frequency a sound source moves towards or away from a detector |
| closed pipe resonator | column air of that vibrates at odd one-fourth wavelengths |
| open pipe resonator | column air of that vibrates at one-half wavelengths |
| harmonics | frequencies above the fundamental frequency of a standing wave |
| beats | difference between closely space frequencies |
| wave speed | how fast a wave travels in meters per second |
| longitudinal wave | the pulse moves parallel to the medium like a sound wave |
| fundamental frequency | lowest note played by a resonating pipe or string |
| constructive interference | crests and crests or troughs overlap troughs to create a wave with greater amplitude |
| destructive interference | crests overlap troughs causing waves to cancel each other |
| reflection | wave bounces off a solid barrier |
| refraction | wave bends as it passes from one medium to another |
