| A | B |
|---|
| elasticity | The ability of a substance to return to its original shape after being disturbed. |
| density | How tightly packed the particles of a medium are. |
| Intensity | The word is the same as loudness. |
| Loudness | This word is the same as intensity. |
| decibels | These are the units for sound. |
| infrasound | Sounds that are so low, they are below our range of hearing. |
| ultrasound | Sounds that are so high, they are above our range of hearing. |
| pitch | When a sound has a high frequency, it has a high __________. |
| doppler effect | An apparent change in the frequency of sound, due to the movement of the source of the sound. |
| timbre | This is another name for sound quality. |
| Music | These are sounds that are pleasing. |
| Noise | These are sounds that are not pleasing. |
| dissonance | Sounds with no musical relationship show this quality. |
| beats | These are alternating loud and soft sounds. |
| acoustics | The study of sound in a certain room or hall. |
| sonar | Sound Navigation and Ranging |
| echolocation | A natural form of SONAR that some animals use. |
| sonogram | This is a picture formed by using ultrasound to look into the body. |
| 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. |
| middle ear | The space behind the eardrum |
| cochlea | A fluid-filled cavity behind the inner ear. |
