Leaf blowers and fall yard work: wear earplugs or earmuffs, fit them right, and expect less than the NRR on the box

In a study of groundskeepers that NIOSH highlights, leaf blowers reached maximum levels of 95 to 106 dBA, depending on the model. NIOSH treats noise at 85 dBA and above as hazardous, and for every 3 dB louder it cuts the recommended daily time in half: 8 hours at 85 dBA, 15 minutes at 100. [S1] [S3] [S4]

Our take: if you have to raise your voice to be heard by someone 3 feet away, put hearing protection in before you start the blower, mower or chainsaw. Roll, pull and hold foam earplugs until they seal, or wear earmuffs, and read the Noise Reduction Rating on the package as a best case. NIOSH says it often doesn’t reflect the protection people actually get. [S1] [S2] [S7]

Louder means less time

Original chart, not to scale: NIOSH’s recommended daily time at each level, from 8 hours at 85 dBA down to under 4 minutes at 106 dBA, with the leaf blower range from the study NIOSH cites shaded. The limits were written for workers; here they’re a yardstick for yard work. The warning signs come from NIOSH. [S1] [S3] [S4]

Why 85 dBA is the line

Whether noise harms your hearing depends on how loud it is, how long it lasts and how often you’re around it. [S1]

85 dBA. NIDCD says sounds at or below 70 dBA are unlikely to cause hearing loss, even after long exposure, while long or repeated exposure at 85 dBA or more can. NIOSH’s recommended limit for workers is 85 dBA averaged over an 8-hour day. [S1] [S9]
The 3 dB rule. For every 3 dBA increase, NIOSH halves the recommended time. Its table works out to 4 hours at 88 dBA, 1 hour at 94, 15 minutes at 100 and under 4 minutes at 106. [S1] [S4]
It doesn’t grow back. Most noise-induced hearing loss comes from damage to the sensory hair cells in the inner ear, and NIDCD says human hair cells don’t grow back. CDC says there’s no medical or surgical treatment for it. [S8] [S9]
Yard tools count. NIDCD lists lawn mowers, leaf blowers and woodworking tools among the harmful noises at home. [S9]
People differ. The NIOSH limit is built around an 8-hour workday, and NIOSH notes that everyone differs in how susceptible they are to noise. [S1]

How loud is yard work?

A 2016 study of university groundskeepers, featured on NIOSH’s science blog, measured the maximum levels of common tools. Each range spans different models of the same kind of tool. [S3]

Maximum levels measured, and NIOSH’s daily time at the quieter end
Tool	Maximum level	NIOSH daily time at the low end
Push mower	86 to 92 dBA	6 hours 21 minutes at 86
Riding mower	88 to 96 dBA	4 hours at 88
Leaf blower	95 to 106 dBA	About 47 minutes at 95
Edger	98 to 106 dBA	About 24 minutes at 98
Chipper	102 to 106 dBA	About 9 minutes at 102
Chainsaw	105 to 109 dBA	Under 5 minutes at 105

Levels from the study NIOSH cites; times from NIOSH’s Table 1-1. These are maximum levels, so the average while you work may be lower. The time column shows how fast the daily limit runs out at those levels. [S3] [S4]

The voice test. If you have to raise your voice to be heard by someone about 3 feet away, the noise is probably at least 85 dBA. If you have to shout, it’s likely 95 dBA or more. [S1] [S3]
Measure it. NIOSH makes a Sound Level Meter app for iOS devices that checks noise levels. [S1] [S3]
It adds up. NIOSH counts a whole day’s noise together, so blowing, then mowing, then edging all draw on the same daily limit. [S4]

Earplugs or earmuffs?

NIOSH says hearing protection works when it’s chosen well, fits well and gets worn every time. The common types: [S2] [S8]

Foam earplugs. These are formable: you roll them thin and they expand to fill the ear canal. [S2]
Pre-formed and custom earplugs. Pre-formed plugs come already shaped to fit most ears. Custom plugs are made from an impression of your ear. [S2] [S8]
Earmuffs. They surround the whole outer ear and are held on by a headband. [S2]

What NIOSH says fits each situation
Situation	What NIOSH says
A long session on a hot day	Earplugs are often more comfortable than earmuffs, especially for long periods or in heat.
A very cold morning	Earmuff cushions don’t seal well against the head in very cold conditions.
Glasses, safety glasses or a helmet	Earmuffs can interfere with eye protection, helmets and some eyeglasses.
Stop and start, dirty hands	Earmuffs and pre-formed plugs are easier to take on and off. Foam plugs have to be rolled with your fingers.
Plugs never feel right	Earmuffs are often easier to fit properly. Earplugs can take practice.
You need to hear people nearby	Level-dependent protectors let quiet sounds through and block loud ones.
All you have are noise-canceling earbuds	They aren’t hearing protection unless they’re labeled with an NRR.
100 dBA or more	Wear earmuffs over earplugs.

Pick the one you’ll keep on. NIOSH calls comfort the key to wearing hearing protection consistently, and says no single protector is the most comfortable for everyone. [S2]

Getting a good seal

NIOSH’s steps for soft foam earplugs are roll, pull and hold. Start with clean hands so you don’t push dirt and germs into your ears. [S7]

Roll. Roll the plug into a small, thin snake with your fingers. [S7]
Pull. With your other hand, pull the top of your ear up and back to straighten the ear canal. The plug should slide right in. [S7]
Hold. Hold it in with a finger until it expands. Your own voice sounds muffled once it has sealed. [S7]
Check. Most of the foam should be inside the canal. Cup your hands tightly over your ears: if sounds get much more muffled, the plug isn’t sealing, so take it out and try again. NIOSH’s other version: count out loud while cupping and uncupping your hands, and with a good fit your voice sounds about the same. [S2] [S7]
Earmuffs. NIOSH says they’re often easier to fit properly. Glasses, a helmet or very cold weather can get in the way of the seal. [S2]
Follow the package. The EPA label rule requires fitting instructions and the warning that improper fit will reduce the protector’s effectiveness. [S6]

Reading the NRR on the package

In the U.S., hearing protectors carry a Noise Reduction Rating under an EPA labeling rule. [S4] [S6]

What the label says. The words “Noise Reduction Rating,” a number in decibels, “(When used as directed),” and a line saying ratings for existing protectors run from about 0 to 30, with higher numbers meaning more protection. [S6]
Earmuffs with a movable headband. If the band can be worn in different positions, the main label has to show the worst-case rating. [S6]
It’s a lab number. NIOSH says the NRR often doesn’t reflect the protection each person actually gets. Its 1998 review found lab ratings consistently overstated real-world protection. [S2] [S4]
The minus 7. The NRR was designed to be subtracted from a C-weighted noise level. For dBA readings like the ones in this guide, OSHA and NIOSH both take 7 dB off the rating first. [S4] [S5]
NIOSH’s haircut. NIOSH also takes 25 percent off the label for earmuffs, 50 percent for formable earplugs like foam and 70 percent for other earplugs, then subtracts the 7. [S4]
A worked example. A 100 dBA blower with foam plugs labeled NRR 30: half of 30 is 15, minus 7 leaves 8, so NIOSH’s method estimates about 92 dBA at your ear. Earmuffs labeled NRR 30: 22.5 minus 7 leaves 15.5, about 84.5 dBA. That gap is why NIOSH recommends earmuffs over earplugs at 100 dBA and up. [S2] [S4]

Rough estimate for your setup

Pick a noise level, a protector and the number on its package to run NIOSH’s method. It’s a cautious workplace estimate, not a measurement. NIOSH says individual fit testing is the best way to know what you’re really getting. [S2] [S4]

How loud?Which protector?NRR on the package

Choose all three to see the estimate.

Around the yard

CDC’s list for protecting your hearing: turn the volume down, walk away from loud noise, take breaks from it, avoid loud activities when you can, and use hearing protection. [S8]

Shorter is better. Under NIOSH’s 3 dB rule, the louder the tool, the shorter the session your ears can take. Breaks between blowing, mowing and edging help. [S4] [S8]
Quieter first. For workplaces, NIOSH puts removing the noise or switching to quieter equipment ahead of hearing protection. [S1]
Kids and bystanders. NIDCD says to protect the ears of children too young to protect their own, and to move away from noise you can’t reduce or block. [S9]
Music under muffs. NIOSH tells workers to keep personal audio low and to listen only in areas that aren’t noisy. [S1]
Where to find them. NIDCD notes that earplugs and earmuffs are sold at hardware and sporting goods stores. [S9]
Leaves in the gutters? Our ladder guide covers the 4 to 1 rule before you climb up to clear them.
Snow is next. When the leaf blower gets swapped for a snow blower, our snow shoveling guide covers why you never clear a jam by hand.

After the noise

Warning signs. Your ears ring, or sounds seem dull or flat after you leave the noise. Needing to turn up the car radio or your phone is another sign. [S1]
Temporary isn’t harmless. NIOSH’s blog says muffled hearing and ringing that clear up by the next morning still mean damage is happening inside the ear. NIDCD says a temporary hearing loss can disappear 16 to 48 hours later and still leave lasting damage. [S3] [S9]
Ringing can stick. For people who use noisy tools regularly, NIOSH says the ringing may become constant. [S3]
Worried about your hearing? CDC says to contact your doctor, protect your hearing as much as possible and take steps to keep it from getting worse. NIDCD says to have your hearing tested if you think you might have hearing loss. [S8] [S9]

Your situation

Pick the one that fits to highlight what the sources say.

Which fits?

Choose one to highlight its row below.

Long session

At 95 dBA and up, NIOSH’s daily time runs out in under an hour. Wear protection the whole time, take breaks and split the job up. [S2] [S4] [S8]

Quick job

At 100 dBA, NIOSH’s limit is 15 minutes for the whole day, and at 106 it’s under 4. NIOSH says to use hearing protection above 85 dBA however short the noise. [S1] [S4]

Loudest tools

Those measured 98 to 109 dBA in the study. NIOSH recommends earmuffs over earplugs at 100 dBA or more. [S2] [S3]

Glasses or helmet

Earmuffs can interfere with eyeglasses, eye protection and helmets, so earplugs may work better with them. [S2]

Cold morning

Earmuff cushions don’t seal well against the head in very cold conditions, so earplugs may be the better pick. [S2]

Hot day

Earplugs are often more comfortable than earmuffs in heat and over long stretches. [S2]

Noise-canceling

NIOSH says they aren’t hearing protection unless they’re labeled with an NRR. [S2]

Kids nearby

Protect the ears of children too young to do it themselves, and walk away from noise you can’t reduce. [S8] [S9]

Ringing ears

That’s a sign it was too loud. Protect your hearing from more noise, and contact your doctor if you think you have hearing loss. [S1] [S3] [S8]

Where the sources differ

The label math: the EPA rule has packages say the noise at your ear is roughly the dBA level minus the full NRR. OSHA’s Appendix B subtracts 7 dB from the NRR first for dBA readings, and NIOSH’s 1998 criteria note that OSHA cuts the rating in half when enforcing its engineering-control rule. NIOSH derates by protector type and subtracts the 7, and its current page says individual fit testing is the best check. This guide’s estimate uses NIOSH’s method, the most cautious of these. [S2] [S4] [S5] [S6]

Other earplugs: NIOSH’s 1998 criteria say to take 70 percent off for “all other earplugs” in Chapter 1 and 75 percent in Chapter 6. The estimate uses Chapter 1’s 70 percent. [S4]

How much protection: NIOSH’s current page says most workers need 10 dB or less of reduction, and almost any protector cuts noise by 10 dB when it’s fit correctly. The derating math can leave less than that from some labels. Both point to fit. NIOSH also warns against overprotection and suggests aiming for 75 to 85 dBA at the ear, so you can still hear what’s around you. [S2] [S4]

Mower numbers: NIOSH’s noise page puts lawn mowers around 85 to 90 dBA, while the study on its blog measured push mowers at 86 to 92 and riding mowers at 88 to 96 dBA maximum. Models and measurements differ. [S1] [S3]

Quick answers

Are noise-canceling headphones hearing protection?

Not unless they’re labeled with an NRR, NIOSH says. Active noise cancellation alone doesn’t count. [S2]

Is a battery leaf blower quiet enough to skip protection?

The sources here don’t give a separate number for battery models. Use the voice test or a sound level meter app: if you have to raise your voice to be heard 3 feet away, treat it as 85 dBA or more. [S1] [S3]

Is a higher NRR always better?

Higher numbers mean more protection on the label, but fit matters more, and NIOSH warns that too much protection can keep you from hearing what’s around you. [S2] [S6]

Should I wear earplugs and earmuffs together?

NIOSH recommends doubling up at 100 dBA or more, or around impulse sounds. The EPA label rule notes that the NRR is based on continuous noise and may not reflect protection against impulse noise. [S2] [S6]

Does the 15-minute limit mean 15 minutes is safe?

It’s NIOSH’s recommended limit for a whole day at 100 dBA, written for workers, and NIOSH notes that people differ in how easily noise damages their hearing. Protection is the safer habit. [S1] [S4]

Are products ranked here?

No. This guide explains published NIOSH, CDC, NIDCD, OSHA and EPA information. It doesn’t rank or endorse any earplug, earmuff, leaf blower or brand, and no products were tested for it.

Sources

NIOSH, CDC, NIDCD, OSHA and eCFR pages checked October 28, 2026. Recommendations here are our editorial reading of those pages; no hands-on results are claimed.