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प्रश्न
State the main components of a hearing aid.
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उत्तर
The main components of hearing aid are microphone , amplifier and earphone.
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संबंधित प्रश्न
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
 |
 |
| I | II |
 |
 |
| III | IV |
Which diagram shows
- a note from a musical instrument
- a soft (or feeble) note,
- a bass (low frequency) note.
Complete the following sentences:
An average person can hear sound of frequencies in the range ______ to _________.
Complete the following sentence:
Ultrasound is of frequency ___________.
Can you hear the sound produced due to vibrations of a seconds pendulum? Give reasons.
A man can hear the sound of frequency :
The properties of ultrasound that make it useful are
The sonic boom of an aircraft has a time period of 0.00005s. Calculate the frequency of sound produced.
What are ultrasonic? State and explain two applications of ultrasounds.
Describe a simple method to find the depth of a submerged ship.
State the properties of ultrasound that make it useful.
