Add or subtract a constant decibel offset (+/- dB) to calibrate this app against a certified external reference SPL meter for higher precision.
Real-time dynamic highlighting matches your current measured ambient noise against standard real-world environmental sound levels.
Rustling leaves, calm breathing, recording studio background noise.
Quiet bedroom at night, whisper at 1m, silent library reading room.
Quiet office, gentle rainfall outside, refrigerator humming.
Quiet residential street, calm conversation, modern dishwasher.
Typical conversation at 1 meter, restaurant murmur, background TV audio.
Busy city street traffic, vacuum cleaner, loud alarm clock ringing.
Lawn mower, hair dryer, heavy diesel truck traffic, food blender (Hearing protection recommended).
Motorcycle passing, electric drill, power chainsaw, subway train arrival.
Live rock concert, car horn at 1 meter, nightclub audio system, sports stadium.
Emergency siren at close range, jet airplane takeoff at 100m, gunshot, fireworks explosion.
Noise levels at or above 85 dB can cause permanent noise-induced hearing loss (NIHL). Safe exposure times halve for every 3 dB increase (NIOSH standard).
| Current Level | Safe Daily Limit | Status / Risk Level |
|---|---|---|
0 – 84.9 dBCurrent Level | Safe / Unlimited | Safe & Comfortable |
85 – 87.9 dB | Max 8 hours/day | Hearing Protection Recommended |
88 – 90.9 dB | Max 4 hours/day | Hearing Protection Recommended |
91 – 93.9 dB | Max 2 hours/day | Hazard on Prolonged Exposure |
94 – 96.9 dB | Max 1 hour/day | Hazard on Prolonged Exposure |
97 – 99.9 dB | Max 30 minutes/day | Hazard on Prolonged Exposure |
100 – 109.9 dB | Max 15 minutes/day | Critical Hazard / Acoustic Trauma |
110 – 140+ dB | Immediate Hearing Damage Risk | Critical Hazard / Acoustic Trauma |