At a distance of 1.5 meters, the acoustic intensity of an automobile horn is approximately equal to ______________ decibels?
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Answer: B. 120
Explanation
An automobile horn measured at a close distance of one point five meters produces an extremely loud sound. Acoustic intensity levels for such automotive warning devices typically reach approximately one hundred and twenty decibels. This high decibel rating corresponds to the human threshold of discomfort and potential auditory pain. The decibel scale is a logarithmic measurement unit used to quantify sound pressure and acoustic intensity levels. Sound intensity decreases inversely with the square of the distance from the acoustic point source. Prolonged human exposure to sound levels exceeding one hundred decibels can cause permanent hearing damage.
Ninety decibels represents the noise level of a busy urban street or a heavy factory floor. One hundred and fifty decibels corresponds to extremely dangerous noise sources like jet aircraft takeoffs. One hundred and eighty decibels is a catastrophic acoustic level capable of causing immediate physical pain and trauma.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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