Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about ______________ decibels?
Correct answer: B. 120
- A. 90
- B. 120
- C. 150
- D. 180
Explanation
A nearby automobile horn commonly produces a sound level of roughly 110 to 120 dB, making 120 dB the closest choice at 1.5 metres. The other values are either too low for a horn or unrealistically high for ordinary vehicle noise.
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