If you have to raise your voice to be heard at arm's length, your ears are already at risk.
That single rule of thumb is worth more than any chart — but stay with me, because understanding a little about how loudness works will change how you think about your ears for good.
How does the decibel scale actually work?
Sound is measured in decibels (dB), and the scale is logarithmic, which means it hides the truth in plain sight. Every 3dB increase is a doubling of sound energy. So 88dB isn't "a bit more" than 85dB — it's twice the acoustic energy hitting your inner ear. By 95dB you're at ten times the energy of 85dB, and 105dB is a hundred times.
Your ears don't perceive it that way — 88dB sounds only slightly louder than 85 — and that mismatch between how it sounds and what it does is exactly why noise damage sneaks up on people.
How loud are everyday sounds?
To calibrate your instincts: a quiet library sits around 40dB. Normal conversation, 60dB. A busy restaurant, 75–85dB. City traffic from the pavement, 80–85dB. A lawnmower, 90dB. A nightclub or loud gig, 95–105dB. A chainsaw, 110dB. A siren up close, 120dB. Fireworks at close range can spike past 150dB.
The danger line for sustained exposure is 85dB — that's where UK workplace regulations require employers to provide hearing protection.
How long can you safely listen at each volume?
Here's the part most people have never been told. At 85dB, your ears can take roughly eight hours a day without expected harm. Because of that doubling rule, every 3dB added cuts the safe time in half:
88dB — about four hours. 91dB — about two hours. 94dB — about one hour. 97dB — about 30 minutes. 100dB — about 15 minutes. 103dB — about 7 minutes. 106dB — under 4 minutes. 110dB — around 90 seconds.
Read that list again with a Saturday night in mind. A 100dB gig gives you a quarter of an hour of unprotected listening before you're in damage territory — and the gig lasts two hours. This isn't a reason to stay home; it's the entire argument for filtered earplugs, which pull the level down 15–20dB and turn an unsafe night into a safe one.
Four signs it's too loud right now
You don't need a meter to make good decisions. In the moment, watch for these:
You have to raise your voice to talk to someone a metre away. That's roughly the 85dB line.
You can't understand someone unless they shout directly into your ear. You're likely in the high 90s or above.
Sound feels physical — you can feel it in your chest, or it verges on uncomfortable. Well past safe for anything but minutes.
Afterwards, your ears ring or the world sounds wrapped in cotton wool. That's a temporary threshold shift — proof the dose was too high. It usually fades, but the harm it signals accumulates with every repeat.
What does loud noise actually do to your ears?
Inside your cochlea are thousands of microscopic hair cells that translate vibration into the signals your brain hears. Loud sound physically batters them. Bent and stressed cells cause the temporary dullness after a loud night; cells that die are gone for good — humans can't regrow them. Damage typically shows up first as difficulty hearing speech in noisy places and ringing in the ears, often years before it appears on a standard test.
What to actually do about it
Three habits cover almost everything. Know your loud places — gigs, stadiums, power tools, motorbikes — and bring filtered plugs to them; a decent pair costs £15–£35 and fits on a keyring. Use distance — doubling your distance from a speaker or machine drops the level substantially, free of charge. Give your ears recovery time — quiet hours after loud ones let temporary stress settle rather than stack.
And if you'd like to know exactly where your hearing stands — the ideal baseline against which to protect it — a full assessment with us takes under an hour, with clear answers the same day.
Book at hearnowclinic.co.uk/appointments — Belfast, Carryduff and Templepatrick. No rush, no pressure. Just answers.
Frequently asked questions
What decibel level damages hearing?
Sustained exposure from 85dB upward carries risk, and every 3dB added halves the safe time — 85dB is safe for about eight hours, 100dB for about 15 minutes.
How can I tell it's too loud without a meter?
If you have to raise your voice to be heard at arm's length, you're at roughly 85dB. If you must shout directly into someone's ear, you're likely well above 95dB.
Does noise damage heal?
Temporary dullness and ringing usually settle, but the underlying damage is cumulative — the inner ear's hair cells don't regrow. Prevention is the only cure.
