Advertisements
Advertisements
Question
What does the intensity of sound depend upon?
Advertisements
Solution
The intensity of sound is directly proportional to the square of the amplitude of vibration. If the amplitude is increased, the sound becomes more intense (louder).
Mathematically: I ∝ A2 (where I is intensity and A is amplitude).
In addition to amplitude, other factors that affect the perceived loudness of sound include:
- Distance from the Source: The intensity of sound decreases as you move further away from the source of the sound.
- Surface Area: A larger vibrating surface area generally produces a sound with greater intensity.
RELATED QUESTIONS
Loudness is determined by the __________ of vibration.
The sound from a mosquito is produced when it vibrates its wings at an average rate of 500 vibrations per second. What is the time period of the vibration?
The ratio of the amplitudes of two waves is 3 : 4. What is the ratio of their loudness?
Name one property of waves that do not change when the wave passes from one medium to another.
Decibel is the unit of pitch of a sound.
The pitch of a flute is decreased by ................... length of air column.
How does sound travel in air?
Two waves of the same pitch have amplitudes in the ratio 1:3. What will be the ratio of loudness?
The frequency of the stretched string of a fixed length is f when it is plucked in the middle. Where should it be plucked so that string vibrates with frequency (i) 2f, (ii) 3f?
Draw diagrams to show these vibrations and name them.
The diagram below shows three ways in which the string of an instrument can vibrate.
(i) Which of the above diagrams shows the fundamental note?
(ii) Which has the frequency 4 times that of the fundamental?
(iii) State the ratio between the frequency of the first and second.
