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Real Decibel Meter
Free browser-based sound level meter in 8 languages
Measure sound levels instantly in your browser - no app download, no account, completely free. Works on any device with a microphone. Includes tone generator, speaker tests, and exposure calculator. All processing happens locally for privacy.
Real Decibel Meter is a free, browser-based sound level meter that measures environmental noise in real-time.
🎯 WHAT IT DOES
• Real-time decibel measurement (dB, dBA, dBC, dBZ)
• A/C/Z frequency weighting (industry-standard filters)
• Fast and Slow time constants
• Energy-averaged Leq calculation
• Min/max/average tracking
• Calibration system for device-specific accuracy
🛠️ INCLUDED TOOLS
1. Real-time Decibel Meter - measure sound levels live
2. Tone Generator - pure test tones (20Hz - 20kHz)
3. Speaker Test - check channels, polarity, and sweep for rattles
4. Hearing Age Test - find your highest audible frequency
5. Noise Exposure Calculator - daily dose from NIOSH 3dB rule
6. Frequency Analyzer - live spectrum visualization
7. Background Noise Test - focused quiet environment measurement
8. Microphone Diagnostics - troubleshoot audio issues
🌍 GLOBAL REACH
• 8 complete languages: English, German, Japanese, Spanish, French, Italian, Portuguese, Korean
• 11 educational guides explaining the science
• Multilingual support for worldwide accessibility
🔒 PRIVACY-FIRST
• All audio processing happens locally in your browser
• No uploads to servers
• No account required
• No tracking beyond basic analytics
• Session data stays in your device's localStorage
💡 USE CASES
• Check if neighbors are too loud
• Measure home office noise levels
• Test studio monitor volume
• Assess classroom acoustics
• Workplace noise screening
• Document noise complaints
• Calibrate speaker systems
• Teach students about sound measurement
⚡ TECHNICAL HIGHLIGHTS
• Built with Web Audio API for real-time DSP
• Static site (Astro) - fast and reliable
• Works on desktop and mobile browsers
• No dependencies on the client side
• Implements proper IEC 61672-style weighting
🎓 EDUCATIONAL
Unlike other tools, we explain HOW it works:
• Detailed methodology page
• Scientific accuracy disclaimers
• Calibration instructions
• Comparison with hardware meters
• Safety and exposure guidance
🆓 COMPLETELY FREE
No ads, no paywall, no "premium" upsell. We built this to be genuinely useful and accessible to everyone.
Perfect for musicians, homeowners, teachers, safety managers, audio engineers, and anyone curious about the sound around them.
About Real Decibel Meter on Product Hunt
“Free browser-based sound level meter in 8 languages”
Real Decibel Meter was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #125 on the daily leaderboard. Measure sound levels instantly in your browser - no app download, no account, completely free. Works on any device with a microphone. Includes tone generator, speaker tests, and exposure calculator. All processing happens locally for privacy.
On the analytics side, Real Decibel Meter competes within Web App, Developer Tools and Audio — topics that collectively have 645.9k followers on Product Hunt. The dashboard above tracks how Real Decibel Meter performed against the three products that launched closest to it on the same day.
Who hunted Real Decibel Meter?
Real Decibel Meter was hunted by webtools. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Real Decibel Meter including community comment highlights and product details, visit the product overview.
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