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The Uses of Sound Waves

Good Essays
The Uses of Sound Waves Thesis: Sound waves are able to carry vibrations through a medium

which results in the transfer of the energy collected in the

vibrations. Transverse waves are vibrations which are at right angles

to the wave’s direction of travel whereas longitudinal waves are

vibrations along the line of wave’s direction of travel. These waves

have a quantifiable speed, wavelength and frequency. Owing to these

properties, sound waves have scores of uses.

Introduction: Human ear is capable of hearing sounds with frequencies

of about 30Hz – 20 kHz. Sound waves are able to travel best through

rigid solids rather than through liquids and gases. However, human

ears have got accustomed to sound waves passing through air, so are

able to hear various things. The loudness of the sound is based on the

incoming waves’ amplitude whereas the pitch of the sound is based on

the incoming waves’ frequency. Musical instruments work by building up

regular vibrations like in the case of strings, skins, tubes of air

which results in the surrounding air vibrating with the same pattern

causing melodious music.

Analysis: Usually sound is absorbed by various objects. However, in

some cases, it is reflected which more commonly called as echo. When

sound strikes soft materials, it is absorbed. Such materials that

absorb most of the energy of sound waves are called sound insulators.

This property of the sound is beneficial to geologists to locate oil

reservoirs. It also helps in tracking earthquakes and to find out how

earthquakes travel through different kinds of rocks and ...

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between two parts of the heart. This speed of the blood could be

calculated by the Doppler equipment of the echocardiogram and an

estimation of pressure gradient through the pulmonary valve could be

quantified.

Similar concept works for Doppler radars which is very useful as a

weather forecasting tool with the use of radio waves. These radars are

used to calculate the frequency change in returning radio waves. Waves

bounce back by something moving away from the antenna change to a

lower frequency whereas waves from an object moving toward the antenna

change to a higher frequency. A computer which is connected to a

Doppler radar uses these frequency changes to show directions and

speeds of the winds blowing around the rain drops, insects and other

objects that reflected the radio waves and provides pictures.
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