| A | B |
|---|
| echo | a reflected soundwave |
| elasticity | the ability of a material to bounce back after being disturbed |
| density | the ration of the mass of a substance to its volume |
| loudness | perception of the energy of a sound |
| decibel (dB) | a unit used to compare the loudness of different sounds |
| ultrasound | sound waves with frequencies above 20,000 Hz |
| larynx | two folds of tissue that make up the human voice box |
| intensity | the amount of energy per second carried through a unit area by a wave |
| pitch | perception of the frequency of a sound |
| infrasound | sound waves with frequencies below 20 Hz |
| doppler effect | the change in frequency of a wave as its source moves in relation to an observer |
| music | a set of tones and ovetones combined in ways that are pleasing |
| overtone | a natural frequency that is a multiple of the fundamental tone's frequency |
| acoustics | the study of how sounds interact with each other and the enviornment |
| reverberation | the echos of a sound that are heard after a sound source stops producing sound waves |
| fundamental tone | the lowest natural frequency of an object |
| ear canal | a narrow region leading from the outside of the human ear to the eardrum |
| eardrum | a small, tightly stretched, drumlike membrane in the ear |
| cochlea | a fluid filled cavity in the inner ear that is shaped like a snail shell |
| echolocation | the use of reflected sound waves to determine distances or to locate objects |
| sonar | a system that uses reflected sound waves to detect and locate objects underwater |
| sonogram | an image formed using reflected ultrasound waves |
