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Year 7 Physics > Sound > Flashcards

Flashcards in Sound Deck (8)
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What happens to the ear drum when you hear a sound?

It vibrates


How can the ear drum get damaged?

Loud sounds can make a hole in it.
Sharp objects can make a hole in it.


What is the wavelength of a wave?

The distance between two peaks on the wave.


What is the amplitude of a wave?

The distance between a peak and the centre line of the wave.


How are pitch and frequency related?

Higher pitch sounds have a higher frequency.


How are amplitude and volume related?

Higher amplitude is louder..


How can two waves combine to make less sound.

Waves superpose together.
If peaks meet troughs the sound cancels out.
That makes the amplitude lower, so it is quieter.


How does sound travel?

Vibrations in particles in a substance.
Sounds travel fastest through solids, then liquids then gases.