
Decibel Meter Ultra
RealtimeSoundMeter.org
Sound Decibel Meter
Sound Meter
Decibel X
DecibelMeter.org
Sound Meter & Noise Detector
Measure noise in decibels with your microphone. Live dB meter with min, max and average, calibration and safe-exposure guidance. Free, private, no install.
LayerStack’s Arm-based cloud virtual machines, powered by cloud-optimized CPU based on Arm architecture that deliver excellent cost-effective processing power, allowing you to easily complete the most demanding application development.
Website, pricing, platforms and company facts side by side.
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LayerStack Arm-based Cloud Server
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| Website | soundleveltest.com | layerstack.com |
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| Company | Startup from the United States · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.

Sound Level Test is a free, privacy-first online acoustic suite that measures sound levels and runs audio calculations directly in your browser. Powered by the Web Audio API, all microphone processing runs 100% on-device—no audio or measurement data is ever recorded, streamed, or uploaded to any...
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As answered by people managing Sound Level Test and LayerStack Arm-based Cloud Server.
Sound Level Test's answer
Sound Level Test runs entirely in the client’s web browser without requiring app store downloads, user accounts, or external audio streaming. Unlike conventional noise meter apps that route microphone feeds through remote servers or monetize via intrusive ads, Sound Level Test uses the native Web Audio API for 100% on-device Digital Signal Processing (DSP). It combines real-time IEC 61672-compliant frequency weighting (dBA/dBC) with a full suite of statutory noise calculators, interactive audio diagnostics, and classroom management tools on a single, privacy-first platform.
Sound Level Test's answer
-Zero Installation & Instant Access: Works instantly across phones, tablets, laptops, and smartboards on Chrome, Safari, Firefox, and Edge with no setup or sign-ups.
-Absolute Data Privacy: Microphone audio never leaves your local hardware; raw samples are processed purely in device RAM and discarded immediately.
-Acoustic Precision & Scientific Standards: Calculations adhere to official acoustic methodologies (OSHA 1910.95, NIOSH REL, WHO environmental noise guidelines, and ANSI/ASA S12.60 standards).
-All-in-One Acoustic Utility Suite: Beyond a simple meter, users get specialized tools for decibel addition, distance attenuation, stereo channel balancing, hearing frequency checks, and noise complaint logging.
-Completely Free with No Intrusive Clutter: Free from paywalls, forced subscriptions, or disruptive banner advertisements.
Sound Level Test's answer
The primary audience spans four core user segments:
-Educators & School Administrators: Teachers seeking visual, gamified noise management displays for quiet study and group activities in classrooms.
-Tenants & Homeowners: Residents documenting neighborhood disturbances, barking dogs, construction, or traffic noise to build structured, verifiable complaint logs for landlords or local councils.
-Occupational Safety & Plant Managers: Safety officers checking workplace sound levels against OSHA/NIOSH daily permissible exposure limits (PEL) to protect workers from acoustic trauma.
-Audio Engineers & Tech Enthusiasts: Musicians, audiophiles, and podcasters calibrating studio monitors, checking stereo panning, analyzing microphone frequency response, or evaluating room acoustics.
Sound Level Test's answer
Sound Level Test was created out of frustration with existing mobile sound meters, which had become bloated with invasive tracking permissions, paywalled decibel features, and intrusive full-screen video ads. Recognizing that modern web browsers possess powerful, low-latency audio processing capabilities through the Web Audio API, the project set out to build an accessible, privacy-respecting alternative. By making calibrated sound measurement and acoustic math transparent, freely accessible, and grounded in published statutory standards, Sound Level Test bridges the gap between unreliable toy apps and expensive dedicated hardware sound level meters.
Sound Level Test's answer
-Framework: React 19 with TanStack Start (full-stack modern SSR/SSG architecture).
-Audio Engine: Zero-dependency, pure TypeScript DSP utilizing the native browser Web Audio API (AudioContext, AnalyserNode, BiquadFilterNode, and real-time canvas rendering).
-Styling & Design System: Tailwind CSS v4 and shadcn/ui component primitives for responsive, high-contrast UI across mobile and desktop.
-Hosting & CDN: Edge deployment via Vercel and Cloudflare with HTTP/3, Brotli compression, and automated CI/CD.
-Data Persistence: Local browser storage (localStorage / IndexedDB) for privacy-preserving, device-only history and complaint exports.
Sound Level Test's answer
Please note that Sound Level Test is an open, privacy-first web utility that does not force logins or track corporate user identities, but our tools are actively utilized by members across key institutional and professional groups:
-K-12 public and private school teachers utilizing the Classroom Noise Monitor on interactive whiteboards.
-Remote workers and freelancers verifying ambient room noise for professional client calls and studio recordings.
-Tenants and apartment resident associations compiling structured records for municipal noise disputes.
-Small workshop and manufacturing business owners checking daily equipment shifts against OSHA compliance tables.
-DIY audio hobbyists and musicians calibrating left/right headphone balance and testing frequency cutoffs.
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