Advertisements
Advertisements
प्रश्न
Which of the following device does not work on the multiple reflections of sound waves ?
पर्याय
stethoscope
hydrophone
soundboard
megaphone
Advertisements
उत्तर
Hydrophone does not work on the principle of multiple reflections.
(b) Hydrophones.
APPEARS IN
संबंधित प्रश्न
What is the other name of a loud-hailer ?
What is meant by 'reflection of sound' ? What type of surfaces are the best for reflecting sound ?
What is an echo ? How is echo formed ?
Explain by giving a scientific reason.
We cannot hear the echo produced in a classroom.
Answer the following question in your own words.
What should be the dimensions and the shape of classrooms so that no echo can be produced there?
How can you calculate the speed of sound using echo?
When sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound remain the same. Do you hear an echo sound on a hotter day? Justify your answer.
To hear an echo, the minimum distance of the obstacle from the source of sound must be ______.
______ allows bats to navigate through dark caves and find insects for food.
Assertion: The sound which we hear again is called Echo.
Reason: The sensation of sound (Echo) persists in our brain for about 1 s.
