PEW Science Suppressor Testing: What the Suppression Rating Means
What Is PEW Science? The Organization Testing Suppressors with Real Data
PEW Science is an independent engineering lab, PEW Science, LLC, that measures how loud suppressed guns are and publishes the results at pewscience.com. It records each shot at the muzzle and at the shooter’s ear, then scores the suppressor-and-gun pairing on a 0-to-100 Suppression Rating, where higher is quieter. The key difference from a maker’s spec sheet is that every suppressor goes through the same setup, so the numbers line up across brands. Use it to compare suppressors, and keep in mind a quiet rating changes nothing about the paperwork: a suppressor is a federally registered item, and some states ban it outright.
Last updated: October 19, 2026 · Originally published March 7, 2026
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Key Takeaways
- PEW Science measures every suppressor at the same two spots: 1.0 m left of the muzzle and 0.15 m from the shooter’s right ear
- Much of the data is free at pewscience.com; full rankings and deeper analysis need a paid membership
- Manufacturer dB claims are often measured under favorable conditions — PEW Science tests all suppressors identically
- The Suppression Rating runs 0 to 100, and higher means quieter
- A rating belongs to a suppressor on a specific host gun, so match the host before you compare
Why Independent Suppressor Testing Matters
For years, suppressor sound reduction claims were largely self-reported by manufacturers using inconsistent methodologies — different measurement distances, different microphone placements, different test ammunition, and different host firearms. This made it nearly impossible to make apples-to-apples comparisons between competing products. A manufacturer claiming “30 dB reduction” might be measuring at 1 meter from the muzzle; another might measure at the shooter’s ear. Both numbers could be technically accurate while being practically incomparable. PEW Science addresses this by establishing and rigorously following a standardized test protocol, then publishing all results — including methodology — for public review and scrutiny.
How PEW Science Tests Suppressors
PEW Science publishes its own test method, the Silencer Sound Standard. Microphones sit 1.0 m to the left of the muzzle and 0.15 m to the right of the shooter’s right ear, with the shooter’s head in place. The gun and microphones are 1.6 m off the ground, and in general five shots are fired in each setup, repeated over several sessions. Because every suppressor goes through the same setup, results from different brands can be compared directly, as long as the host gun and ammunition match.
How to read a Suppression Rating
The number people quote is a Suppression Rating, and it runs 0 to 100 on one comparative scale. Higher is quieter. It is not a decibel figure and it is not a single measurement, which is why it will not match the number on a manufacturer spec sheet. It is built from six things at once, and each one maps to something you actually care about.
| What is measured | Where | What it tells you |
|---|---|---|
| Peak pressure at the muzzle | 1.0 m to the left of the muzzle, firearm 1.6 m off the ground | How loud it is for anyone standing beside you on the line |
| Peak pressure at the ear | 0.15 m to the right of the shooter right ear, with the head in place | What you hear, including sound bouncing off your own head |
| How long the pressure wave lasts | Both positions | Why two suppressors with the same peak can feel completely different |
| Phase and frequency | Both positions | Whether the report is a sharp crack or a dull thump |
| Hearing damage risk | Modeled for shooter and bystander, warned and unwarned | Roughly how many rounds a day you can fire before doing permanent damage |
| The suppressor paired with its host | Whole weapon system, about five shots per configuration | That a rating belongs to a suppressor on a specific rifle, not to the suppressor alone |
Method summarized from the PEW Science Silencer Sound Standard and test method pages, read September 15, 2026. The ratings themselves are PEW Science data and live on their site; we do not republish them.
Understanding PEW Science dB Ratings
PEW Science reports peak sound pressure in decibels at both microphone spots, plus how long that pressure lasts, and folds those into the Suppression Rating along with a hearing-damage estimate for the shooter and anyone nearby. Lower peak numbers mean a quieter shot. A 3 dB difference is a doubling or halving of sound energy, and about 10 dB is heard as roughly twice or half as loud, so even 1 to 2 dB matters between good suppressors near the hearing-safe line.
What PEW Science Tests Tell You About Real-World Performance
PEW Science’s standardized test data is the best available proxy for real-world suppressor performance in controlled conditions. However, real-world results will vary based on several factors: your specific host firearm’s barrel length and gas system tuning, the specific ammunition lot and temperature on the day you shoot, and environmental acoustics (indoor vs. outdoor, terrain reflections). PEW Science’s data is best used as a comparative tool — identifying which suppressors perform better relative to each other in the same caliber — rather than as an absolute prediction of exactly how loud your specific setup will be. Suppressors that score well in PEW Science testing consistently perform well in real-world use, but the exact dB numbers will vary.
PEW Science Beyond Sound Testing
PEW Science also maps hearing-damage risk around the shooter, does private testing for manufacturers and U.S. government contract work, and licenses the Suppression Rating for commercial use. The lab says it does not make, sell, design or distribute silencers, and that it answers to engineering boards rather than the suppressor industry.
Using PEW Science Data in Your Suppressor Purchase Decision
When comparing suppressor options, check PEW Science’s published database for test results on models you are considering. Look for tests conducted with the same host firearm and ammunition you plan to use, or the closest available equivalent. Pay attention to the measurement location — muzzle measurements and shooter’s-ear measurements tell you different things about real-world use. Compare the tested suppressor’s performance against both other suppressors in the same class and against unsuppressed baseline measurements for the same caliber. A suppressor that reduces muzzle sound from 165 dB to 135 dB represents 30 dB of genuine protection — the difference between certain hearing damage and significant (though not complete) hearing protection.
How Manufacturers Respond to PEW Science Testing
Manufacturers can hire PEW Science for private testing. Those results stay confidential unless the client releases them, and when PEW publishes contracted work it carries a disclosure with the contract number. That is worth checking when a maker quotes a PEW result: look for the disclosure and read the full review on pewscience.com rather than a cropped number in an ad.
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Frequently Asked Questions About PEW Science
Is PEW Science affiliated with any suppressor manufacturer?
No. PEW Science, LLC says it does not make, sell, design or distribute silencers. It is funded by paid memberships and its own research, and it also takes contracted testing from manufacturers. When contracted results are published, they carry a disclosure with the contract number.
Where can I find PEW Science suppressor test data?
At pewscience.com. Much of the lab’s data is free on the site, including sound signature reviews sorted by caliber; full rankings and deeper analysis are for paying members. Check that any number someone quotes comes from PEW’s own review page, not a cropped figure in an ad.
How does PEW Science’s data compare to manufacturer dB claims?
Manufacturer dB claims often differ from PEW Science’s independently measured results — sometimes favorably, sometimes not. Differences arise from testing methodology: manufacturers may use shorter measurement distances, different reference levels, or test conditions optimized for their product’s best performance. PEW Science runs every suppressor through the same setup, so its numbers compare fairly across brands. When evaluating a suppressor with both manufacturer claims and PEW Science data available, trust the PEW Science numbers for comparative purposes, and treat manufacturer claims as directional marketing rather than precise specifications.
What is a PEW Science Suppression Rating?
It is PEW Science’s 0-to-100 score for a suppressor on a specific host gun. Zero is the harshest sound signature and 100 the quietest possible. It blends peak loudness and how long the sound lasts at the muzzle and at the shooter’s ear with a hearing-damage estimate, so it is not a decibel number and will not match a maker’s spec sheet.
Does a good PEW Science rating mean I can skip hearing protection?
No. A suppressor lowers the peak, but it does not make most guns hearing-safe on its own. PEW’s ratings include a hearing-damage estimate for exactly that reason. Wear hearing protection for sustained shooting, especially indoors or under a roof.
Disclosure: PopularSuppressors.com is a media property of Brand Avalanche Media, Inc. All editorial opinions are our own.
For in-depth suppressor sound comparisons, testing methodology, and performance reviews, visit Guns & Gadgets Daily, BAM’s firearms gear publication.
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