10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Sound - 1
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Detailed Solution for Test: Sound - 1 - Question 1
Pitch is that characteristic of a musical sound by which a shrill sound can be distinguished from a grave one, even though the two sounds may be of the same intensity.
It is also defined as that characteristic of sound by which the ear assigns it a place on a musical scale.
When a stretched string is plucked, a sound of a certain pitch sensation is produced.
If the tension in the string is increased, the pitch (the shrillness) becomes higher. Increasing the tension, also increases the frequency of vibration. Therefore, pitch is intimately related to frequency.
But frequency alone does not determine the pitch. Below 1000Hz, the pitch is slightly higher than the frequency and above 1000Hz the position is reversed.
The loudness of sound also affects the pitch up to 1000Hz. An increase in loudness causes a decrease in pitch. From about 1000 to 3000Hz, the pitch is independent of loudness, while above 3000Hz an increase in loudness causes an increase in pitch.
Detailed Solution for Test: Sound - 1 - Question 2
The length of the vocal chords differs in men and women, which is why there is difference in the quality of their voice. The length of the vocal chord in men is approximately 20 mm and in women it is 15 mm.
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