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What is ultrasound ?...

What is ultrasound ?

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**Step-by-Step Solution:** 1. **Understanding the Term "Ultrasound":** - The term "ultrasound" is derived from two components: "ultra" and "sound." - "Ultra" means beyond or above, indicating a higher range. 2. **Frequency Range of Human Hearing:** - The human ear can detect sound frequencies ranging from 20 Hertz (Hz) to 20 kilohertz (kHz). ...
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ICSE-PROPAGATION OF SOUND WAVES -EXERCISE -8(B)
  1. What do you mean by the audible range of frequency?

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  2. Write the audible range of frequency for the normal human ear.

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  3. For which range of frequencies, human ears are most sensitive ?

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  4. Which has the higher frequency - ultrasonic sound or infrasonic sound?

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  5. We can hear sounds of frequency in the range of ............

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  6. Complete the following sentence : Ultrasound is of frequency ...........

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  7. Complete the following sentence : Infrasonic sound is of frequency ……...

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  8. Complete the following sentence : Bats can produce and hear ............

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  9. Complete the following sentence : Elephants produce ............. so...

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  10. Name the sounds of the frequencies given below: 10 Hz

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  11. Name the sounds of the frequencies given below: 100 Hz

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  12. Name the sounds of the frequencies given below: 1000 Hz

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  13. Name the sounds of the frequencies given below: 40 Hz

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  14. Can you hear the sound produced due to vibrations of a seconds' pendul...

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  15. What is ultrasound ?

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  16. State the approximate speed of ultrasound in air.

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  17. The properties of ultrasound that make it useful, are

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  18. Explain how do bats locate the obstacles and prey in their way.

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  19. State two applications of ultrasound.

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