I researched noise levels of power equipment tonight. Leaf blowers specifically.
I ended up on an Echo website that talks about noise levels of blowers
https://www.echomeansbusiness.com/pages/low_noise_blowers_why_they_are_better
First, the website exaggerated noise levels of the places below. I usually see concerts quoted as around 110-120 decibels. I'm not saying that's good but I've never seen a concert listed at 135 - 145 decibels. I'm not going to a concert with a sound meter and standing in front of the speakers either.
- Concerts – these measure anywhere from 135 to 145 decibels.
- Gunshots – depending on the gun, anywhere from 145 to 155 decibels.
- Shuttle Launch – not an average sound, but you can imagine just how loud they can be. These generally measure anywhere from 165 to 170 decibels.
When pitching their low noise blower they measure the noise 50 feet away from the machine with the end of the tube 1" away from the ground. It's required when doing this test that the noise level is 10 db quieter 50 feet away when the blower is NOT running per ANSI 175.2. The manufacturer then states:
So knowing all of this, where does the PB-250LN gasoline powered blower from ECHO fall in terms of decibels? Measured at 50 feet, it is a mere 65 dB(A)! The level of decibels the ECHO blower puts out at the operator's ear falls well below the range of our examples.
I have to ask how loud the blower is at the operators ear? They only tell you it's "Well below." I'm assuming the sound level is around 105 - 110 db because I've read chainsaws usually come in around 115 db at the operators ear. Why not give the end user a number???
Feeling frustrated realizing that the writing is on the walls but manufacturers choose to hide the truth or skew noise tests.
Most power equipment shops carry ear muffs with nrr rating of 25 db to be used by people, like me, operating chainsaws that generate 115 db. Why wouldn't they all carry Peltor X5A's with nrr of 31 for 10 dollars more?
Did I avoid this information all my life? I assumed if you grabbed any pair of ear muffs you'd be ok and that's what I did. Were these charts on the walls with the shiny toys? Did the dealer tell me to get the best earmuffs I could to protect my hearing? The manuals recommend hearing protection but they don't say how much. In hind sight there's no such thing as too much hearing protection.
I enjoy this website because it shares the sound level at the operators ear
https://www.husqvarna.com/us/products/chainsaws/t536li-xp/966729272/ . You have to dive into the content pretty far but the info
is there.
A battery powered chainsaw, the t536li, produces 106 db max and 93 db at the operators ear. It's easy to work with those numbers as opposed to significantly below the sound level of the space shuttle.
I found this website which has some great noise levels in it
https://www.asha.org/public/hearing/Noise/