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Sound



mcqs by everyone

Echoes maybe heard more than once due to


An ultrasonic wave is sent from a ship towards the bottom of thesea.
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 normal human ear can hear a sound only if its frequency lies between


As compare to air, speed of sound in liquids and solids is


SI Unit of time period is __________


What do dolphins, bats and porpoise use


Sound energy passing per second through a unit area held perpendicular is called


Ultrasonic waves carry more


The pitch of sound depends on


Sound waves can be transmitted by any


Characteristic of sound by which we distinguish between shrill and grave sound is


To hear a distinct echo each time interval between the original sound and the reflected sound must be:


Characteristic of sound by which we can distinguish between a shrill and a grave sound is known as


The persistence of audible sound due to the successive reflections from the surrounding objects even after the source has stopped to produce that sound is called _________


If speed of sound in air is 330 ms-1 and wavelength is 10 cm. frequency of sound should be


Sound propagates maximum in


Echoes may be heard more than once due to successive or multiple reflections


Unit of wavelength is __________


When sound travels through air, the air particles ______


When a wave travels through a medium ______


A marine survey ship sends a sound wave to seabed which receives an echo after 2.5 s. speed of sound in seawater is 1200 ms-1. depth of sea is


If a normal conversation have sound intensities of 3×10-6Wm-2. intensity of sound for 100dB would be


Intensity level of rustling of leaves is


If a nurse counts 68 heartbeats in 1 minute, then period of heartbeats should be


SONAR ranging is also used to see object's


Loudest animal sound ever recorded is of


SONAR is abbreviation of


Technique used to absorb noise by using soft and porous surfaces is called


Difference between loudness (L) of an unknown sound and loudness Lo is known as


Vibrations inside the ear are amplified by the three bones namely the _________ in the middle ear