Question

A person produces two sound waves with a flute one immediately after the other. Both sound waves have the same pitch, but the second one is louder. Which of the following properties is greater for the second sound wave?
A) Frequency
B) Amplitude
C) Wavelength
D) Speed in air

Answer 1

Answer:

Option B is the right choice.

Explanation:

Given:

Two sounds waves lets say $S_1$ and $S_2$ having same pitch but

We have to find the property which from the options and identify which one is greater for $S_2$ .

Lets take one and one analysis of the terms.

a.

Frequency :

• It is how fast the sound wave is oscillating.
• Frequency is $f=\frac{1}{T}$ hertz.

• The faster the sound wave oscillates the higher pitch it will have.

According to the question the pitch is same so the frequency will be same for both the waves.

b.

Amplitude :

• The loudness of the sound increases with an increase in the amplitude of sound waves.
• It is the maximum amount of displacement of a particle on the medium from its rest position.

c.

Wavelength :

• Distance between two consecutive crest (high) or trough (low) is called wavelength.
• Shorter wavelength will have higher frequency.

Here the frequency is same so the wavelength for $S_1,S_2$ will be same.

d.

Speed in air:

• Speed of sound in a same medium is usually same.
• Speed of sound in air is 343 m/s.

So,

Amplitude of $S_2 > S_1$ .

Here the amplitude of the louder sound wave will be greater .