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प्रश्न
What is the noise? Give an example.
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उत्तर
Noise is a harsh and unpleasant sound produced by a body making a succession of irregular and discontinuous disturbances, e.g., a sound produced by a stone thrown on a thin sheet, the thunder of lightning, etc.
संबंधित प्रश्न
If the amplitude of vibration is large, sound is feeble.
The lower the frequency of vibration, the higher is the pitch.
Shrillness of a sound is determined by the ______ of vibration.
An enemy plane is at a distance of 300 km from a radar. In how much time the radar will be able to detect the plane? Take velocity of radio waves as 3 × 108 ms−1.
What do you understand by the loudness of sound?
State the safe limit of sound level in terms of decibel for human hearing.
Match the following
| column A | column B |
| (A) Amplitude | (1) frequency |
| (B) Frequency | (2) amplitude |
| (C) Loudness | (3)maximum displacement on either side |
| (D) Pitch | (4) presence of other frequencies |
| (E) Waveform | (5) 1/ time period |
Two identical guitars are played by two persons to give notes of the same loudness and pitch. Will they differ in quality? Give reason for your answer.
Two musical notes of the same pitch and same loudness are played on two different instruments. Their wave patterns are as shown in figure.
How do they differ in
(a) loudness,
(b) pitch and
(c) quality
How does the two sounds of same loudness and same pitch produced by different instruments differ? Draw diagrams to illustrate your answer.
