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We can hear sounds of frequency in the r...

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

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20 Hz, 20 kHz
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A man can hear the sound of frequency:

Ultrasonic and Infrasonic Waves: The sound having frequency 20 Hz to 20 KHz is called audible sound Human ear cannot hear sound of frequencies lying outside this range. The limits of audibility of sound vary from individual. Generally the upper limit decreases with increase of age of individual, usually and people can not hear sound of frequency more than 15 kHz. Sound of frequencies below 20 Hz are called infrasonics, while frequencies beyond 20 kHz are called ultrasonics. Ultrasonics can be heard by dogs, cat bats etc. Bats detect the path by means of ultrasonics. Ultrasonics can be used for diagnosis of tumour and other abnormalities within our body. This is known as ultrasonography. Ultrasonics are used to curve various diseases and to measure depth of oceans to detect submarines.Ultrasonics are used for navigation by

Ultrasonic and Infrasonic Waves: The sound having frequency 20 Hz to 20 KHz is called audible sound Human ear cannot hear sound of frequencies lying outside this range. The limits of audibility of sound vary from individual. Generally the upper limit decreases with increase of age of individual, usually and people can not hear sound of frequency more than 15 kHz. Sound of frequencies below 20 Hz are called infrasonics, while frequencies beyond 20 kHz are called ultrasonics. Ultrasonics can be heard by dogs, cat bats etc. Bats detect the path by means of ultrasonics. Ultrasonics can be used for diagnosis of tumour and other abnormalities within our body. This is known as ultrasonography. Ultrasonics are used to curve various diseases and to measure depth of oceans to detect submarines. The waves produced by simple pendulum (having time period 2 seconds) are A. infrasonic B. audible C. ultrasonic D. none of these

Ultrasonic and Infrasonic Waves: The sound having frequency 20 Hz to 20 KHz is called audible sound Human ear cannot hear sound of frequencies lying outside this range. The limits of audibility of sound vary from individual. Generally the upper limit decreases with increase of age of individual, usually and people can not hear sound of frequency more than 15 kHz. Sound of frequencies below 20 Hz are called infrasonics, while frequencies beyond 20 kHz are called ultrasonics. Ultrasonics can be heard by dogs, cat bats etc. Bats detect the path by means of ultrasonics. Ultrasonics can be used for diagnosis of tumour and other abnormalities within our body. This is known as ultrasonography. Ultrasonics are used to curve various diseases and to measure depth of oceans to detect submarines. If speed of infrasonics, a audible and ultrasonics waves are v_(i) , v_(a) and v_(u) then A. v_(i) > v_(a) > v_(u) B. v_(i) = v_(a) = v_(u) C. v_(i) D. v_(i) > v_(a) , v_(u) > v_(a)

Audio frequency range is from

A sound of single frequency is called a

A person can hear sound waves in the frequency range 20 Hz to 20 kHz. Find the minimum and the maximum wavelengths of sound that is audible to the person. The speed of sound is 360 m s^-1 .

Our ear can hear the frequency of sound waves

A bat moving at 1 0 ms^(-1) towards a wall sends a sound signal of 8000 Hz towards it. On reflection it hears a sound of frequency f. The value of g in Hz is close to (speed to sound = 320 ms^(-1) ) :

A bat can hear sound of frequencies up to 120 kHz. Determine the minimum wavelength of sound which it can hear. Take speed of sound in air to be 344 ms^(-1)

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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