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  • Topic: Ultrasound.

  • Why is ultrasound used in sonar?

  • Hey.

  • Looks like you are searching for a treasure hidden in a sunken ship.

  • Why don't you use a sonar?

  • It will emit ultrasounds and help you locate the ship.

  • You know what.

  • I have a better idea.

  • No.

  • A music system will make ordinary sound.

  • So, it is of no use.

  • Don't fool me.

  • I know that the music system is the right choice.

  • See.

  • You are not able to find the ship.

  • Now will you use a sonar?

  • Look.

  • You easily found the ship.

  • Do you know how a sonar could locate the sunken ship?

  • It was because of ultrasound.

  • Ultrasounds are sounds having very high frequencies which start from 20,000 Hertz.

  • So, is ultrasound used in sonar because of its high frequency?

  • You are absolutely correct.

  • Due to its high frequency, an ultrasound can penetrate to a greater depth.

  • Thus helping us to locate the depth of the sea, sunken ships, etc.

  • But, I am not able to hear the ultrasound?

  • It is because human beings can hear sound frequencies from 20 Hertz to 20,000 Hertz.

  • As ultrasounds have frequencies higher than 20,000 Hertz, we cannot hear them.

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A2 初級 美國腔

為什麼超聲要用在聲納上?| 為什麼要在聲納中使用超聲? (Why is ultrasound used in sonar? | #aumsum)

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    AumSum 發佈於 2021 年 01 月 14 日