So I seem to have noticed a "creep in volume" over the last few months, and the one thing I can think of is working as a daily delivery driver. It doesn't "feel" loud, but a decibel meter shows the dBC and dBZ levels average at about 85, sometimes hitting 90, when driving. I tried today with earplugs and earmuffs, and it was quieter, but with the earmuffs on, I really started to notice the lower humming of the engine more (louder than I thought). The dBA shows an average of 70, but that doesn't help.
Firstly, is it possible that having the earmuffs on somehow makes the noise MORE damaging, because it "echos" the vibrations and noise around my ears?
Secondly, suppose the decibel meter is accurate, I've heard lower frequently noises can still cause damage by vibrating the ear and stereocilia - is there any risk of this?
Thirdly, I've seen some say that lower frequency sounds can't be adequately blocked by earplugs/earmuffs. Is this true?
Also, I always assume to use the Z and C weightings on the decibel as it more accurately shows the damage you might be being subjected to, is this right?
The problem is my ears aren't like healthy people, the standards aren't the same for us...
Firstly, is it possible that having the earmuffs on somehow makes the noise MORE damaging, because it "echos" the vibrations and noise around my ears?
Secondly, suppose the decibel meter is accurate, I've heard lower frequently noises can still cause damage by vibrating the ear and stereocilia - is there any risk of this?
Thirdly, I've seen some say that lower frequency sounds can't be adequately blocked by earplugs/earmuffs. Is this true?
Also, I always assume to use the Z and C weightings on the decibel as it more accurately shows the damage you might be being subjected to, is this right?
The problem is my ears aren't like healthy people, the standards aren't the same for us...