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Professional sound measurement in your browser. No installation required.
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Understanding Sound Levels
Learn about decibels, noise levels, and how to protect your hearing with our comprehensive guide
What is a Decibel (dB)?
A decibel (dB) is a unit used to measure the intensity of sound. It's a logarithmic scale, which means each 10 dB increase represents a 10-fold increase in sound intensity.
Key Facts:
• 0 dB is the threshold of human hearing
• Every 10 dB doubles the perceived loudness
• 80+ dB can damage hearing over time
A-Weighting
Our meter uses A-weighting, which adjusts measurements to match how the human ear responds to different frequencies.
Why A-weighting?
• More accurate for everyday sounds
• Reduces low-frequency emphasis
• Standard for noise exposure limits
Common Sound Levels Reference
🔇
30-40 dB
Breathing, whisper
🤫
40-50 dB
Library, quiet office
💬
50-60 dB
Normal conversation, residential area
📺
60-70 dB
Television, restaurant
🚗
70-80 dB
Busy street, vacuum cleaner
🚂
80-90 dB
Subway, lawn mower
⚡
90-100 dB
Power tools, motorcycle
🚨
100+ dB
Concert, airplane takeoff
Legend: Safe levels• Potentially harmful levels
Frequently Asked Questions
Is this tool accurate?
Our tool provides reference measurements suitable for general use. For professional, medical, or legal purposes, please use calibrated sound level meters.
Why do I need microphone permission?
Microphone access is required to measure sound levels from your environment. We process audio locally and never record or transmit your audio data.
What's the measurement range?
Our meter measures from 30 dB (very quiet environments) to 130 dB (extremely loud sounds), covering most everyday situations and workplace scenarios.
Does this work on mobile devices?
Yes! Our tool is fully optimized for mobile devices and works in modern browsers like Chrome, Safari, Firefox, and Edge on both iOS and Android.
Important Disclaimer:
Measurements are for reference and educational purposes only. Results may vary depending on device microphone quality and environmental conditions. This tool should not be used for professional, medical, or legal sound measurements. Always use certified equipment for critical applications.
When do you need a decibel meter?
From construction sites to baby bedrooms – our sound level meter fits every noise scenario.
🎵
Concerts & Clubs
Sound levels above 100 dB damage your hearing within minutes. Measure before the show to know when ear protection is needed.
🏗️
Construction & Factory
OSHA mandates hearing protection above 90 dB (8-hr average). Check if your workers need protection before damage occurs.
👶
Baby Room & Sleep
WHO recommends below 40 dB for sleep environments. Noise above 55 dB measurably disrupts infants and children.
💼
Office & Home Office
Office noise above 50 dB reduces productivity by up to 66%. Identify noise sources and create a focused workspace.
When does noise become dangerous? The 85 dB threshold
The human ear is built for quiet environments. Above 85 dB, hair cells in the inner ear begin to die — permanently. The louder the sound, the faster the damage accumulates.
85 dB8 hrsLawn mower, busy street
94 dB1 hrMotorcycle, loud music
100 dB15 minPower tools, pneumatic drill
110 dB2 minRock concert, chainsaw
120 dB+InstantSiren, gunshot
Hearing damage is irreversible. Lost hair cells never grow back. Protect your ears before it is too late.
Online decibel meter vs. professional sound level meter
🌐 Browser Decibel Meter (this tool)
- ✓Free & instant — no setup
- ✓No download required
- ✓Reference measurements for everyday use
- ✓Works on any device with a microphone
- ○Not IEC 61672 calibrated
- ○Not suitable for legal or regulatory purposes
- ○Accuracy varies by device microphone
🔬 Professional Sound Level Meter (Class 1/2)
- ✓IEC 61672 / OSHA certified
- ✓Suitable for regulatory compliance
- ✓±0.5 dB accuracy
- ✓Data logging and report generation
- ○Cost: $100–500
- ○Requires periodic calibration
For certified workplace noise measurements, we recommend a Class 2 sound level meter:
Recommended Products
This section contains Amazon affiliate links. We may earn a small commission at no extra cost to you.
85+ dB → Protect Your Ears
Loop Experience 2
If our meter shows 85 dB+, protect yourself. Loop Experience 2 filters harmful noise while preserving music quality – for concerts, commutes, and everyday life.
SNR 18 dBMusic FilterReusable
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3M Peltor SportTac
Professional electronic earmuff for workplace use. Amplifies quiet sounds while blocking dangerous noise spikes above 82 dB. Built for construction and industry.
SNR 26 dBElectronicEN 352-1
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Class 2 Sound Level Meter
Browser meters are great for reference. For certified workplace compliance (OSHA, EU), upgrade to a calibrated Class 2 SLM with IEC 61672 certification.
Class 2IEC 6167230–130 dB
View on Amazon