Standing approximately 100 meters away from an afterburner-equipped jet engine exposes a person to a noise level around _____________ decibels?
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Answer: C. 170
Explanation
Jet engines equipped with afterburners produce deafening noise levels reaching approximately 170 decibels at close range. Standing one hundred meters away places an observer close enough to experience extreme acoustic pressure waves. Afterburners inject raw fuel directly into the exhaust stream, generating massive thrust and roaring sound. Jet aircraft propulsion relies on the high velocity expulsion of hot combustion gases through a nozzle. Decibel values above one hundred and forty can cause immediate physical pain and permanent hearing damage. Sound energy dissipates with distance, but close proximity to military jets generates hazardous acoustic extremes.
Option A suggests one hundred twenty decibels, which is typical for a rock concert but too low for afterburners. Option B proposes one hundred forty decibels, corresponding to the threshold of pain near standard jet takeoffs. Option D indicates two hundred decibels, which exceeds normal atmospheric acoustic pressure propagation limits safely.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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