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What is called the sound wave above than frequencies of 30,000 Hz?

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Important Questions on Physics

MEDIUM
General Awareness>General Science>Physics>Sound
For a wave, wavelength divided by the time period is equal to_____.
EASY
General Awareness>General Science>Physics>Sound
Which of the following is not a characteristic of sound wave?
EASY
General Awareness>General Science>Physics>Sound
What is the velocity of sound in air?
MEDIUM
General Awareness>General Science>Physics>Sound
What is the effect on apparent frequency when the distance between the source of the sound and listener is decreased?
EASY
General Awareness>General Science>Physics>Sound
The speed of sound in seawater is _____:
EASY
General Awareness>General Science>Physics>Sound

Which of the following statements is correct?

EASY
General Awareness>General Science>Physics>Sound
Bats search out prey and fly in dark nights by emitting and detecting reflections of which type of Sound Waves?
EASY
General Awareness>General Science>Physics>Sound
In SONAR, we use
EASY
General Awareness>General Science>Physics>Sound
Which of the following wave types is an example of the waves produced by a moving motorboat on water's surface?
MEDIUM
General Awareness>General Science>Physics>Sound
Which of the following animals can produce ultrasound?

 

EASY
General Awareness>General Science>Physics>Sound
The vibration of which among the following produces only odd harmonics?
EASY
General Awareness>General Science>Physics>Sound
Waves produced at the bottom of the sea due to an explosion are _____:
EASY
General Awareness>General Science>Physics>Sound
Which of the following creatures use ultrasonic sound to catch their prey?
MEDIUM
General Awareness>General Science>Physics>Sound
What is the rate at which a wave moves through water and is measured in knots?
EASY
General Awareness>General Science>Physics>Sound
Sound cannot travel through _____.
EASY
General Awareness>General Science>Physics>Sound
Sound waves cannot travel through a
EASY
General Awareness>General Science>Physics>Sound
Ultrasonic waves are produced by making use of ____.
EASY
General Awareness>General Science>Physics>Sound
In which of the following medium does sound travel the fastest?
EASY
General Awareness>General Science>Physics>Sound
The speed of sound is maximum in _____:
EASY
General Awareness>General Science>Physics>Sound

What is the noise level of normal conversation?

1. About 60 dB
2. About 70 dB
3. About 80 dB
4. About 90 dB