Revision: Sound

13 Sound - Revision Quiz

Test your understanding of Sound here:

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1) Four sound waves are imaged on a c.r.o. using the same gain and timebase values.

Which sound wave has the highest frequency?

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2) Two sound waves are displayed on the cathode ray oscilloscope with the same settings.

Which statement about the two sounds is correct?

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3) Which is not an application of ultrasound?

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4) A pure note is displayed on the screen of a C.R.O. as shown in the diagram below.

If the time base setting of the C.R.O. is set to 2.0 ms cm-1, what is the frequency of the note?

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5) 2018 S4 EOY P1 Q14

The echo sounder of a ship emits a pulse of sound which is reflected back to the ship by a shoal of fish directly below the transmitter. The time between the transmission and reception of the pulse is 20 ms. At what depth are the fish from the ship if the speed of sound in sea water is 1400 m/s?

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