Note and Tone
Two musical notes of the same pitch and same loudness are played on two different instruments. Their wave patterns are shown in the figure.
Explain why are the wave patterns different.
State one difference between a musical note and a noise.
How can one identify a person in a dark room?
Note is a sound
of mixture of several frequencies
of mixture of two frequencies only
of a single frequency
always unpleasant to listen
Choose the correct option:
1 - ii, 2 - iv, 3 - iii, 4 - i
1 - ii, 2 - iii, 3 - iv, 4 - i.
1 - iii, 2 - ii, 3 - iv, 4 - i
1 - ii, 2 - iii, 3 - i, 4 - iv
Assertion: Noise is irritating for the ears.
Reason: Musical sounds consist of a regular succession of pulses in which there is no sudden change in the amplitude.
Both Assertion (A) and Reason (R) are correct and the reason is the correct explanation of the assertion.
Both Assertion (A) and Reason (R) are correct but the reason is not the correct explanation of the assertion.
Assertion (A) is correct, but the reason (R) is false.
Assertion (A) is false, but the reason (R) is correct.
(ii) Name the characteristic which enables one to distinguish the sound of two musical instruments even if they are of the same pitch and same loudness.
(iii) Which characteristic of sound makes it possible to recognise a person by his voice without seeing him?