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What happens to sound when it strikes a hard and smooth surface?

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Important Questions on Acoustics

HARD
Which surface is most effective for sound reflection?
EASY
What is the speed of sound in air at room temperature?
HARD
How does reflection of sound differ from refraction of sound?
EASY
What is the reflection of sound called when it reaches the ear after 0.1 seconds?
HARD
What is the purpose of using concave surfaces in sound reflectors?
EASY
What is the minimum distance required for an echo to be heard?
HARD
Why do we not hear echoes in small rooms?
EASY
The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?
HARD
What is reverberation?
HARD
What is the effect of reverberation in an auditorium?
HARD
What is the primary use of sound reflection in architecture?
HARD
Which property of sound is essential for echo formation?
HARD
Which type of surface absorbs sound the most?
HARD
What is the role of reflection of sound in SONAR?
HARD
How can sound waves be directed to specific areas?
HARD
How can echo formation be reduced in a room?
EASY
The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?
HARD
Which phenomenon makes it possible to hear sounds in a canyon?
HARD
Which phenomenon is used in the working of a stethoscope?
EASY
Which principle explains the reflection of sound?