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
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?
Smaller the membrane, .................. is the pitch.
Why is the loudness of sound heard by a plucked wire increased when mounted on a sound board?
Name the characteristic of sound related to its frequency
Figure shows two jars A and B containing water up to different heights. Which will produce sound of higher pitch when air is blown on them?
Name the characteristic of the sound affected due to a change in its
(a) amplitude (b) waveform (c) frequency.
Why is the loudness of the sound heard by a plucked wire increased when it is mounted on a sound board?
It is observed that during march-past we hear a base drum distinctly from a distance compared to the side drums.
(i) Name the characteristics of sound associated with the above obervation.
(ii) Give a reason for the above observation.
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.
Two waves of the same pitch have their amplitudes in the ratio 2 : 3.
(i) What will be the ratio of their loudness?
(ii) What will be the ratio of their frequencies?
