Question

1.How does the increase in amplitude affect the loudness?
2.How does decrease in frequency affect the pitch of the sound?
3.What is the frequency of a source of sound which vibrates 600 times in 3 seconds?
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Answer 1

Answer:

1. The amplitude of a sound wave determines its loudness or volume. A larger amplitude means a louder sound, and a smaller amplitude means a softer sound. The vibration of a source sets the amplitude of a wave.

2. A frequency is how frequent sound waves pass a certain point in a second. Pitch is how high or low we hear a sound to be. If the frequency is higher, the pitch is higher. The lower the frequency, the lower the pitch.

3. Frequency of source of sound ν=100 Hz

This means the source vibrates 100 times in 1 sec.

∴ Number of times the source vibrates in 60 s is N=60×100

---> N=6000

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