Sound is attenuated as it travels through a medium. Which of these factors affects the degree by which sound is attenuated? Select all that apply. Marks are deducted for incorrect responses.Group of answer choicesThe frequency of the soundThe medium the sound is transmitted throughThe polarisation of the sound waveInitial amplitude of the soundThe distance over which the sound travels
Question
Sound is attenuated as it travels through a medium. Which of these factors affects the degree by which sound is attenuated? Select all that apply. Marks are deducted for incorrect responses.Group of answer choicesThe frequency of the soundThe medium the sound is transmitted throughThe polarisation of the sound waveInitial amplitude of the soundThe distance over which the sound travels
Solution
The factors that affect the degree by which sound is attenuated include:
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The frequency of the sound: Higher frequency sounds are more easily absorbed by the medium they're traveling through, which means they're more attenuated.
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The medium the sound is transmitted through: Different mediums absorb sound waves to different extents. For example, sound travels further in water than it does in air because water is less absorbent.
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Initial amplitude of the sound: The louder the sound (i.e., the greater its initial amplitude), the further it can travel before it's attenuated to the point of being inaudible.
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The distance over which the sound travels: The further sound has to travel, the more it's attenuated. This is because the energy of the sound wave is spread out over a larger area.
The polarisation of the sound wave does not affect sound attenuation. Sound waves are longitudinal waves and do not have polarization. Polarization is a property of transverse waves, like light waves.
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