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Write the (approximate) range of frequen...

Write the (approximate) range of frequencies of ultrasound.

Text Solution

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(a) Bat : `30 kHz` to `50 kHz`
(b) Dolphins : `100 kHz` (From `20 kHz` to `1 GHz`).
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Knowledge Check

  • The frequency of ultrasound is :

    A
    Above 20000 vibration/sec
    B
    Under 20000 vibration/sec
    C
    Under 20 vibration/sec
    D
    None of the above

  • The frequency of ultrasound waves is

    A
    less than 20 Hz
    B
    between 20 Hz and 2 kHz
    C
    between 2 kHz and20kHz
    D
    greater than 20 kHz

  • The audible range of frequencies is

    A
    20kHz to 20MHz
    B
    20Hz to 20 kHz
    C
    20Hz to 20MHz
    D
    None of these

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