12. Source:coolmath.com & The National Safety Council Threshold of hearing whispering Conversation Car interior Sewing machine Busy Traffic Screaming Child Diesel Truck Jack hammer Air drill Lawn mower Helicopter Snowmobile Inboard motorboat Sand blaster Fender amp @ 10” Auto horn Propeller aircraft Trumpet peak @ 5” Gun Shot Jet engine Rocket launch Everyday noise and recommended maximum exposure levels. A 5 dB reduction is about 30% quieter and is a 50% decrease in the risk! deciBel
13.
14. Construction Trades Hearing Conservation Percent of workers experiencing hearing loss (by trade). Source: American Society of Safety Engineers
15. Loss of hearing sensitivity due to hazardous noise exposures from either steady state noise or impulse noise does occur even before we can measure the change!…. And it does carry negative consequences!!! When Does it Happen
41. Listening through HPDs takes practice but the threshold shift caused from wearing them is temporary…the shift caused from not protecting yourself could be permanent!!!!