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प्रश्न
Explain the following and illustrate your answer by drawing appropriate diagram:
Quality of a musical note.
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उत्तर
Quality of a musical note: quality of a sound is that characteristic which distinguishes the two sounds of the same loudness and same pitch, but emitted by two different instruments. It depends on the waveform.
Two sounds of same amplitudes (i.e same loudness) and
same frequency but of different wave forms.
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संबंधित प्रश्न
If the amplitude of vibration is large, sound is feeble.
When sound propagates in air, it does not carry energy with it.
Decibel is the unit of pitch of a sound.
The pitch of a stringed instrument is increased by .................. tension in string.
Name the unit in which the loudness of sound is expressed.
State the factors that determine
(a) the pitch of a note.
(b) the loudness of the sound heard.
(c) the quality of the note.
Figure shows four waves A, B, C, and D
Name the wave which shows
(a) a note from a musical instrument,
(b) a soft note
(c) a shrill note.
Why is the loudness of the sound heard by a plucked wire increased when it is mounted on a sound board?
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.
A 0.6 m long stretched wire is made to vibrate in two different modes as shown in figure
(a)
(b)
(i) If the frequency of the note produced in (b) is n, what is the frequency in case (a)?
(ii) In which case (a) or (b), is the note louder? Give reasons.
(iii) In which case is the pitch higher? Give reason.
