Advertisements
Advertisements
प्रश्न
What are hearing aids?
Advertisements
उत्तर
A hearing aid is a device which increases the loudness and intensity of the incoming sound.
APPEARS IN
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.
 |
 |
 |
| (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.
Sonar makes use of :
Name three animals which can hear ultrasonic vibrations.
What is Galton’s whistle? To what use is it put?
The sonic boom of an aircraft has a time period of 0.00005s. Calculate the frequency of sound produced.
What are ultrasonic?
State the main components of a hearing aid.
State the properties of ultrasound that make it useful.
Bats produce ______ sound during screaming.
The range of audible frequency for the human ear is
