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प्रश्न
Complete the following sentences:
An average person can hear sound of frequencies in the range ______ to _________.
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उत्तर
An average person can hear sound of frequencies in the range 20 Hz to 20 kHz.
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संबंधित प्रश्न
A microphone is connected to the Y-input of a C.R.O Three different sounds are made in turn in front of the microphone. Their traces (a), (b) and (c) produces on the screen are shown in following figure.
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| (a) | (b) | (c) |
- Which trace is due to the loudest sound? Give reason for your answer.
- Which trace is due for the sound with the lowest pitch? Explain your answer.
Complete the following sentence:
Ultrasound is of frequency ___________.
Complete the following sentence:
Infrasonic sound is of frequency ______________.
Name the sound of the frequency given below:
10 Hz
Name the sound of the frequency given below:
40 kHz
State two applications of ultrasound.
Sonar makes use of :
What are ultrasonic? State and explain two applications of ultrasounds.
What are hearing aids?
State the properties of ultrasound that make it useful.
