Advertisements
Advertisements
Question
Which of the following device does not work on the multiple reflections of sound waves ?
Options
stethoscope
hydrophone
soundboard
megaphone
Advertisements
Solution
Hydrophone does not work on the principle of multiple reflections.
(b) Hydrophones.
APPEARS IN
RELATED QUESTIONS
When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day?
Which of the following statement best describes frequency?
In which medium, air or water, an echo is heard much sooner ? Why ?
What is meant by 'reflection of sound' ? What type of surfaces are the best for reflecting sound ?
State the laws of reflection of sound.
An echo-sounder in a trawler (fishing boat) receives an echo from a shoal of fish 0.4 s after it was sent. If the speed of sound in water is 1500 m/s, how deep is the shoal ?
Answer the following question in your own words.
What is an echo?
To hear an echo, the minimum distance of the obstacle from the source of sound must be ______.
______ is an image obtained by the use of reflected ultrasonic waves.
What is an echo? Write the conditions to hear an echo.
