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Hello Everyone, I'm the Professor and I’m here to challenge you again. If you can answer these questions correctly, then you just might be as intelligent as I am. Take the challenge and let's find out!
Entries with all five correct answers are automatically entered into a drawing to one of our NoisePro DL Units – the prize includes the NoisePro-DL Datalogging Noise Dosimeter with class 2 pendant microphone, computer interface cable, microphone windscreen, calibrator adapter and storage case. Valued at $1,690.
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1. Under U.S. OSHA regulations, the Permissible Exposure Level (PEL) of occupational noise is 90 dBA for eight hours and equates to 100% dose exposure. The Action Level to place employees in a hearing conservation program is 85 dBA during an eight hour shift. What is the percentage dose exposure of the Action Level?



2. Do some workers risk puncturing their eardrums with insert type ear plugs?



3. What can cause Tinnitus (ringing in the ears or head noise)?



4. Does high noise exposure affect a worker’s blood pressure?



5. What instrument best evaluates a worker’s exposure to varying noise exposures during an 8 hour shift?



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