Sound Test - 53...

The waves remain undeviated over long distances:

Which of the following is not an application of ultrasound?

An ultrasonic wave is sent from a ship towards the bottom of the sea. It is found that the time interval between the sending and receiving of the wave is 1.6 s. What is the depth of the sea, if the velocity of sound in the seawater is 1400 m/s?

A device based on multiple reflection used as hearing aid.

In an auditorium or big hall excessive reverberation is highly _______.

Loud sound can travel a __________ distance as it is associated with_________ energy.

The ultrasound waves can penetrate into matter to a large extent because they have:

How does sound from a sound producing body travel through air to reach our ears?

Megaphones or loudhailers, horns, musical instruments such as trumpets and  shehnais, are all designed to ______.

Explain why, if we strike a table lightly, we hear a soft sound but if we hit the table hard, a loud sound is heard.