Which of the following statements is incorrect?

Audible range of human ear is 20 Hz- 20000 Hz.

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The sound above 45 dB is physically painful to the ear.

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Pleasing sound tune is also known as musical note.

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Planting trees can reduce noise pollution.

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Solution

The correct option is B The sound above 45 dB is physically painful to the ear.
The sound above 80 dB is physically painful to the ear. Human ear's audible range is between 20- 20 kHz.
Planting trees helps in cutting down/absorbing the sound comming from the traffic to the residents.

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