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8L Sound @ AJHS
8L sound and hearing
| Question | Answer |
|---|---|
| amplitude | Half the height of a wave. |
| cochlea | The part of the ear that changes vibrations into electrical impulses. |
| decibel (dB) | Unit for measuring the loudness of a sound. |
| eardrum | A thin membrane inside the ear which vibrates when sound reaches it. |
| frequency | The number of waves each second. |
| hertz (Hz) | The unit for frequency. 1 hertz means one wave per second. |
| impulse | Electrical signal carried by a nerve cell. |
| intensity | The loudness or volume of a sound. |
| loudness | How loud a sound is; the volume of a sound. |
| noise | Unpleasant sound. |
| oscilloscope | An instrument which shows a picture of a wave on a screen. |
| pitch | How high or low a note sounds. |
| sound intensity meter | A meter which measures the loudness of a sound. |
| threshold of hearing | The quietest sound that can be heard. |
| vacuum | A completely empty space with no particles. |
| vibrate | Move backwards and forwards. |
| wave | A way of transferring energy. Waves can be side to side or backwards and forwards movements. |
| wavelength | The distance between the top of one wave and the top of the next. |
Created by:
johncl
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