Advertisements
Advertisements
Question
State three factors on which loundess of sound heard by a listener depends.
Solution
The loudness of the sound heard depends on:
(i) Loudness is proportional to the square of the amplitude.
(ii) Loudness is inversely proportional to the square of distance.
(iii)Loudness depends on the surface area of the vibrating body.
APPEARS IN
RELATED QUESTIONS
Decibel is the unit of pitch of a sound.
Define the following terms :
(a) Amplitude
(b) Frequency
(c) Time period.
Name the unit in which loudness of sound is measured.
Explain the following and illustrate your answer by drawing appropriate diagram:
Loudness
Name the factors which determine the pitch of a note.
How do you account for the fact that two strings can be used to give notes of the same pitch and loudness but of different quality?
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?
What is acoustics?
