How Much Noise Does a Lawn Mower Emit?
Lawn mowers vary in the amount of noise they make, but all types are unfortunately quite loud. While you cannot do much to change the noise a lawn mower emits, you can try to choose a quieter model by reading the voluntary noise labels some manufacturers use. You should also wear ear protection when you mow to protect your hearing.
Noise level is measured in decibels, with lawn mowers producing around 90 dB. While this is akin to the level of normal headphones, which may range up to 110 dB, it still isn’t a healthy level of noise. This is louder than traffic noise -- which averages around 80 dB -- and you should not subject yourself to it for more than eight hours, even with hearing protection, advises Pennsylvania State University.
Necessary Mower Noise
Unfortunately, you can only reduce lawn mower noise so much. According to a September 2005 article published in "Acoustical Society of America Journal," the noise emitted by a lawn mower is irrevocably tied to its cutting efficiency. Blades lift and cut the grass, and to do so neatly, must rotate quickly, which creates a buffeting noise against the air. An unpowered reel mower makes the least noise because it has no engine.
Although lawn mowers are usually loud, if your machine sounds louder than normal, it may signal trouble or loose parts. If you are hearing a loud rattling noise, check that all screws and bolts are tight, which will reduce the possibility of the engine rattling against the deck, for example. A worn or rusted muffler might also increase engine noise. Keep in mind that while you might be able to get an after-market muffler that is more effective at reducing noise, some mufflers are integral to the mower’s safe operation, so ensure the new muffler will perform as well. Always turn off and disable your mower before you perform any maintenance.
The noise a lawn mower produces is above 85 dB, the level at which Occupational Safety and Health Administration recommends hearing protection. So, any time you use a lawn mower, you should use either earplugs or earmuffs. However, you must wear both properly for them to be effective, putting earplugs all the way in and wearing earmuffs flush against the head. Contrary to popular belief, wearing ear protection against loud background noise, such as that produced by mowers, makes it easier to hear a person trying to talk to you.
Sarah Moore has been a writer, editor and blogger since 2006. She holds a master's degree in journalism.