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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. |