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Sound intensity

In subjective evaluation terms, 70 dB is considered loud. Which of the following types of sound have this level of intensity?

A. loud street noise
B. kitchen blender
C. average conversation
D. average radio
E. average street noise

I. A, B
II. D, E
III. C, D
IV. none of the above

AnswerII. Average radio and average street noise are about 70dB. Loud street noise and kitchen blender are commonly 90 dB (very loud) and the average conversation is moderate at 50 dB.

ARE 4.0 exam prep: BS

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