Properties of sound waves: Waves: Physics: GCSE (9:1)

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14 Terms

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Sound wave

Longitudinal waves that cause particles to vibrate parallel to the direction of wave travel

<p>Longitudinal waves that cause particles to vibrate parallel to the direction of wave travel</p>
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Medium

A material through which a wave can be transmitted

<p>A material through which a wave can be transmitted</p>
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Mediums that sound can travel through

Sound can travel through solids, liquids and gases

<p>Sound can travel through solids, liquids and gases</p>
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Speed of sound

Depends on the medium that the sound is travelling through

<p>Depends on the medium that the sound is travelling through</p>
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Speed of sound in air

Approx. 330 metres per second (m/s)

<p>Approx. 330 metres per second (m/s)</p>
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Speed of sound in a vacuum

Sound cannot travel through a vacuum because it needs particles to vibrate

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How the ear allows sounds to be heard

Sound waves cause the ear drum and other parts to vibrate which causes the sensation of sound

<p>Sound waves cause the ear drum and other parts to vibrate which causes the sensation of sound</p>
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Frequency of a sound wave

Related to the pitch of a sound

<p>Related to the pitch of a sound</p>
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Relationship between frequency and pitch

The higher the frequency, the higher the pitch

<p>The higher the frequency, the higher the pitch</p>
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Amplitude of a sound wave

Related to the loudness of a sound

<p>Related to the loudness of a sound</p>
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Relationship between amplitude and loudness

The higher the amplitude, the louder the sound

<p>The higher the amplitude, the louder the sound</p>
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Range of human hearing

20 Hz to 20,000 Hz

<p>20 Hz to 20,000 Hz</p>
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Ultrasound

Sound waves that have a frequency higher than the upper limit for human hearing (above 20,000 Hz)

<p>Sound waves that have a frequency higher than the upper limit for human hearing (above 20,000 Hz)</p>
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Infrasound

Sound waves that have a frequency lower than the lower limit for human hearing (below 20 Hz)

<p>Sound waves that have a frequency lower than the lower limit for human hearing (below 20 Hz)</p>