Practice Test 1
Basic sound concepts and wave terminology.
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Q1.
Why is sound called a form of energy?
Q2.
Can sound travel in vacuum? Why or why not?
Q3.
What is the SI unit of frequency?
Practice Test 2
Numericals from wave relation and hearing range.
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Q1.
A wave has frequency 500 Hz and wavelength 0.68 m. Find its speed.
Q2.
If frequency increases, what happens to the pitch of sound?
Q3.
What is the approximate audible frequency range for humans?
Practice Test 3
Reflection of sound, echo, and reverberation.
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Q1.
What is an echo?
Q2.
Why are soft curtains and padded seats used in auditoriums?
Q3.
State one application of multiple reflection of sound.
Practice Test 4
Ultrasound, sonar, and ear-based revision.
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Q1.
What is ultrasound?
Q2.
What is SONAR used for?
Q3.
Why should sharp objects never be inserted into the ear?
Quick Q&A Before You Revise
Why is sound faster in solids than in gases?
Because particles in solids are packed more closely and pass vibrations along more quickly.
How do I remember loudness versus pitch?
Think amplitude for loudness and frequency for pitch.
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