Description
A free online decibel meter that measures sound levels in your browser using your microphone (nothing is recorded or uploaded). It also includes a free online hearing test, a hearing-age tone test, a CDC/NIOSH-sourced decibel chart of common sounds, and a US city noise map built from federal data.
No-Login Task
"Measure sound levels in real time with your mic, take a hearing test and a hearing-age test, and view the decibel chart and the US city noise map. No account, nothing recorded."
Editorial Review & Verification
Hands-on VerifiedAcoustic professionals, workplace safety inspectors, musicians, and everyday users needing instant real-time decibel level measurement, NIOSH threshold monitoring, and pure-tone hearing screening without registration
Browsing, customizing, and generating production-ready CSS keyframe animations and transitions directly in the browser.
+ Key Strengths (Pros)
- ✓ Web Audio API real-time metering: analyzes microphone input directly in browser memory with zero recording or cloud streaming
- ✓ Comprehensive acoustic suite: features A-weighting approximation, manual device calibration offsets, and a 30-second rolling history with NIOSH 85 dB limits
- ✓ Pure-tone audiometry screening: delivers per-ear hearing checks across 250 Hz to 8 kHz speech frequencies with interactive tone calibration
- ✓ Authoritative reference database: includes a 42-sound decibel level comparison chart cited from CDC, NIOSH, and NIDCD research
− Limitations (Cons)
- − Lacks export functionality to save recorded 30-second SPL time-series data as CSV or JSON logs
- − Smartphone and laptop microphones lack hardware acoustic calibration, yielding approximate ±10 dB baseline estimates
Deep Privacy & Sandbox Audit & Product Power & Utility Review
Microphone input is processed transiently in local browser memory through the Web Audio API without persistent audio buffers or server uploads. Network inspection verified 3 telemetry requests to Google Analytics (G-6XR4JYXGWZ); no audio samples, voice recordings, or microphone data were transmitted over the network.
Audited Web Audio API SPL meter and Pure Tone Audiometry suite across 250 Hz-8 kHz range. Verified local 30s rolling canvas graph and A-weighting toggle. Inspected network traffic to confirm 3 analytics payloads with zero audio data egress.
- ✓ Client-side processing is supported by catalog metadata and runtime evidence
- ✓ Bounded runtime observation found no payload egress; this is not architectural proof
- ✓ Runs locally without persistent server dependencies
- ✓ No commercial ad networks or cross-site tracking beacons
- ✓ Zero tracking pixels or third-party behavioral profiling scripts
- ✓ Clean script execution environment without user fingerprinting
- ✓ Proprietary frontend and application service
- ✓ Zero-login functionality verified by NoLoginTools manual audit
- ✓ Runtime network egress and cookies verified via automated scanner
- ✓ Tool is online and accessible
- ✓ Monitored continuously by NoLoginTools automated prober
- ✓ No scheduled downtime or access gating detected
NoLogin Lab™ Verified Telemetry & Empirical Audit
Zero data retention; all operations executed strictly in local client memory.
Local client-side execution utilizing in-browser WebAssembly, Canvas, or Web Audio APIs.
Direct lossless file export in open standard formats without forced watermarks or paywall modals.
Primary operational canvas becomes interactive immediately upon URL load with zero registration intercept.
Verified authentic web utility with direct zero-login access and stable production operations.
Verification Details
Microphone input is processed transiently in local browser memory through the Web Audio API without persistent audio buffers or server uploads. Network inspection verified 3 telemetry requests to Google Analytics (G-6XR4JYXGWZ); no audio samples, voice recordings, or microphone data were transmitted over the network.
Tags
Health History
FAQ
- Does Online Decibel Meter (Decibel Shield) require an account?
- No. Online Decibel Meter (Decibel Shield) has been verified by nologin.tools to provide its core functionality — Measure sound levels in real time with your mic, take a hearing test and a hearing-age test, and view the decibel chart and the US city noise map. No account, nothing recorded. — without requiring any login or signup.
- Is Online Decibel Meter (Decibel Shield) free to use?
- Online Decibel Meter (Decibel Shield) is listed on nologin.tools as a tool you can use without creating an account. Check the tool's own site for details on pricing or premium features.
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