Noise and Hearing Damage
The Engineering Toolbox – the 6 decibel rule
OSHA showing the 8-hr max safety threshold of 90dB instead of the former 85dB
CDC Noise and Hearing Loss chart threshold is 85 dB for 8 hr max
Hearing protection gear for landscapers: How well ear plugs and ear muffs work
American Academy of Audiology Sound Chart
Assessment of Occupational Noise Exposure among
Groundskeepers in North Carolina Public Universities, 2016
DC City Council Public Hearing, acoustic study on leaf blowers, July 2018
Lawn and Garden Equipment Sound: A Comparison of Gas and Electric Equipment, 2018
Understanding decibels, “loudness” vs “sound intensity”, why 20 dB sounds twice as loud as 10 dB, but has 10 times greater sound pressure
