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85 dB vs 95 dB

95 dB is 10 dB louder than 85 dB — about 10× the sound energy and roughly 2.0× the perceived loudness. In practice that is the difference between heavy city traffic and an electric power drill.

The bars show the two levels on the 0–140 dB scale. The gap looks small as a number, but on a logarithmic scale each 10 dB is a ten-fold jump in energy.

	85 dB	95 dB
Typical source	Heavy city traffic	An electric power drill
Category	Very loud	Very loud
Sound pressure	0.3557 Pa	1.1247 Pa
NIOSH safe time	8 hours	48 min
Protection needed	Yes	Yes

Why 10 dB is a bigger jump than it looks

A 10 dB gap looks small written down, but decibels are logarithmic. Every 10 dB multiplies sound energy by ten and roughly doubles perceived loudness. Going from 85 dB to 95 dB therefore multiplies the acoustic energy by about 10× while your ear reports something closer to 2.0× as loud. Both statements are true — they simply measure different things.

Which one is safe?

Both levels are at or above the 85 dBA action level, so both need exposure limits. At 95 dB the safe unprotected window is only about 48 min.

Hearing protection

For anything above 85 dB, rated protection matters. Look at the NRR (US) or SNR (EU) figure — real-world reduction is roughly (NRR − 7) ÷ 2.

Electronic ear muffs (NRR 22–25)Shooting, mowing — amplify speech, block bangsLink coming soon

Reusable filtered earplugs (NRR 20)Concerts & musicians — flat attenuationLink coming soon

Foam earplugs (NRR 32)Sleep, travel, DIY — highest raw NRRLink coming soon

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The distance equivalent

One intuitive way to feel a 10 dB difference is to think in distance. Outdoors, every doubling of distance removes about 6 dB, so standing at 95 dB versus 85 dB is roughly like standing 3.2× closer to the same source. Conversely, moving about 3.2× further away would bring 95 dB down to 85 dB.

Adding the two levels together

Decibels do not add arithmetically. A 85 dB source running alongside a 95 dB source does not produce 180 dB — the correct total is 95.4 dB, calculated as 10 × log₁₀(10^(85/10) + 10^(95/10)). Because the louder source dominates, the quieter one contributes only 0.4 dB. Our decibel calculator does this for any combination.

Frequently asked questions

Is 95 dB much louder than 85 dB?

95 dB carries about 10 times the sound energy of 85 dB and is perceived as roughly 2.00 times as loud.

What is the difference between 85 dB and 95 dB?

The difference is 10 dB. 85 dB is comparable to heavy city traffic, while 95 dB is comparable to an electric power drill.

What do 85 dB and 95 dB add up to?

Combined, two sources at 85 dB and 95 dB produce about 95.4 dB — not 180 dB — because decibels add logarithmically.

Which is safe, 85 dB or 95 dB?

Both exceed the 85 dBA action level, so both need exposure limits and, ideally, hearing protection.

See each level in detail

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Sources & accuracy. Reference levels are drawn from published data by NIOSH, OSHA, the CDC, the WHO Environmental Noise Guidelines and the American Speech-Language-Hearing Association (ASHA). Real-world readings vary with distance, room acoustics and the specific source, so treat every figure as a typical value rather than an exact constant. Last reviewed 2026-08-11.