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प्रश्न
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?
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उत्तर १
If the two strings are plucked at different places in the same way and their lengths are adjusted such as they give notes of the same pitch and loudness, their waveforms will differ. Hence they will be of different quality.
उत्तर २
The ‘quality’ of a given note is determined not by its frequency and loudness but by the overall effect of the harmonics present in it. The harmonics are multiples of the fundamental or basic frequency of the ‘note’. Depending on the conditions under which vibrations are taking place, sometimes we get one set of harmonics and sometimes another set. The quality of the two notes would then be different even though their fundamental frequencies may be the same.
संबंधित प्रश्न
A person is standing at the seashore. An observer on the ship which is anchored in between a vertical cliff and the person on the shore fires a gun. The person on the shore hears two sounds, 2 seconds and 3 seconds after seeing the smoke of the fired gun. If the speed of sound in the air is 320 ms-1 then calculate:
1) the distance between the observer on the ship and the person on the shore.
2) the distance between the cliff and the observer on the ship.
The quality of a sound depends on the amplitude of wave.
When sound travels in form of a wave
Define the following term:
Frequency
State the factors that determine
(a) the pitch of a note.
(b) the loudness of the sound heard.
(c) the quality of the note.
Why is the loudness of the sound heard by a plucked wire increased when it is mounted on a sound board?
Give scientific reason for the following:
When a nail is hammering appears to get higher and higher in pitch.
The same musical note when played on a piano and when played on a flute sounds different.
Which characteristics of sound will change if there is a change in its amplitude.
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.
