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What is the audible range of the average human ear? - Science

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प्रश्न

What is the audible range of the average human ear?

एक पंक्ति में उत्तर
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उत्तर

The audible range of an average human ear lies between 20 Hz and 20,000 Hz. Humans cannot hear sounds with frequencies less than 20 Hz and greater than 20,000 Hz.

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अध्याय 12: Sound - Intext Questions [पृष्ठ १७०]

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एनसीईआरटी Science [English] Class 9
अध्याय 12 Sound
Intext Questions | Q 1 | पृष्ठ १७०

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संबंधित प्रश्न

What is the range of frequencies associated with ultrasound?


A person has a hearing range from 20 Hz to 20 kHz. What are the typical wavelengths of sound waves in air corresponding to these two frequencies? Take the speed of sound in air as 344 m s−1.


Fill in the blanks with suitable words.
 A sound wave consists of places of higher pressure called ................. and places of................pressure called.................


What name is given to the sound waves of frequency too low for humans to hear ?


What name is given to the sound waves of frequency too high for humans to hear ?


What is the frequency range of hearing in humans ?


Which of the following sound frequencies cannot be heard by a human ear ?

(i) 10 Hz
(ii) 100 Hz
(iii) 10,000 Hz
(iv) 15 Hz
(v) 40,000 Hz 


What are ultrasonic waves ? Name two animals which can produce ultrasonic waves.


Three different vibrating objects produce three-types of sounds X, Y and Z. Sounds X and Y cannot be heard by a man having normal range of hearing but sound Z can be heard easily. The sound X is used in hospitals to break kidney stones of a patient into fine grains which then get flushed out with urine. The sound Y is similar to that which is produced during an earthquake before the main shock wave is generated.

(a) What type of sounds are (i) X (ii) Y, and (iii) Z ?
(b) Name one device which can produce sound like X.
(c) Name one device in a science laboratory which can produce sound like Y.
(d) Name one device in our homes which can produce sound like Z.
(e) What is the frequency range of sounds like Z ?


One of the following can hear infrasound. This one is :


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