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प्रश्न
What are hearing aids?
एक पंक्ति में उत्तर
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उत्तर
A hearing aid is a device which increases the loudness and intensity of the incoming sound.
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संबंधित प्रश्न
Complete the following sentence:
Ultrasound is of frequency ___________.
Complete the following sentence:
Bats can produce and hear ___________ sound.
Name the sound of the frequency given below:
1000 Hz
Explain how do bats locate the obstacles and prey in their way.
What do you understand by the term ultrasonic vibrations?
What is Galton’s whistle? To what use is it put?
What are ultrasonic? State and explain two applications of ultrasounds.
State the main components of a hearing aid.
Describe a simple method to find the depth of a submerged ship.
Ultrasound has frequency of vibration
