| A | B |
|---|
| amplitude | maximum displacement from the rest position of a wave |
| frequency | number of vibrations per second |
| interference | result of superposition of two or more waves |
| wavelength | shortest distance between points where the wave pattern repeats itself |
| standing wave | appears not to move |
| sound level | sound pressure |
| octave | difference between two frequencies with a ratio of 2:1 |
| resonance | increasing amplitude of a vibration by applying small external force at the same frequency |
| musical note | wave with a pleasant sound |
| random noise | displeasing noise with jagged, unpredictible waves |
| loudness | caused by the amplitude of the wave |
| dissonance | wave with an unpleasant sound |
| timber | sound quality |
| doppler shift | how a bat detects food |
| fundamental note | lowest resonant frequency |
| beat | oscillation in amplitude of wave cause when slightly different frequencies are added |
| pitch | caused by frequency of wave |
| speed of sound | 343 m/s |
| harmonics | multiples of the fundamental frequency |
| echo | reflected sound wave |
| decibel | unit of sound level |
| quality | what gives musical instruments varying sounds |
