Physics
Sounds above …………… are termed as noise pollution.
- 75 dB
- 120 dB
- 100 dB
- 80 dB
Sound
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Answer
120 dB
Reason — Noise pollution refers to unwanted or harmful sound that interferes with normal activities and causes annoyance or disturbance. Sounds above 120 dB is considered as potentially harmful to human health and contribute to noise pollution.
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Related Questions
The relationship between loudness L and intensity I is given as:
- L = k log10 I
- L = k loge I
- L = k/log10 I
- none of the above
1 dB is defined as the increase in the level of loudness when the intensity of the sound increases by :
- 20%
- 25%
- 26%
- 10%
Two sounds of the same loudness and same pitch produced by two different instruments differ in their
- amplitudes
- frequencies
- wave forms
- all the above
Instruments A and B are producing sounds of the same amplitude, same waveform but frequencies F and 2F respectively. Which of the following statements is correct ?
- both A and B differ in quality
- B is grave but A is shrill
- A is grave but B is shrill
- B is louder than A