What makes Carithm's sound meter better than others?

Unlike basic dB readers, Carithm includes professional-grade acoustic analysis: ITU-R BS.1770 LUFS K-weighting, 4x polyphase oversampled True Peak detection, 1/3-octave RTAs, and spectrograms. We also link these metrics directly to our AI acoustic diagnostic engines for machinery.

How many decibels is normal conversation?

Normal conversation measures about 60 dB at a distance of one metre. A whisper is around 30 dB and a vacuum cleaner is around 70 dB.

Does the sound meter work on iPhone and Android?

Yes. It runs entirely in modern browsers (Safari, Chrome, Edge). No app store download is required.

The Ultimate Online Sound Meter & Acoustic Analyzer

Published 21 September 2026

Stop settling for basic decibel readers. Carithm brings a professional-grade acoustic laboratory directly to your browser. Measure live dB levels, LUFS, True Peak, and visualize frequency spectrums—completely free.

No downloads, no signup: Runs instantly in Chrome, Safari, and Edge.
Pro-Grade DSP: True peak oversampling, 1/3-Octave RTA, and ITU-R BS.1770 LUFS.
100% Private: Audio is processed locally on your device and never uploaded.

Carithm Pro Acoustic Analyzer

Requires microphone permission. Powered by Carithm's advanced Web Audio DSP engine.

More Than Just a Noise Level Meter

Our online sound level meter extracts deep acoustic intelligence from a standard microphone. Here is the information our recording software reveals about your audio environment:

LUFS & Loudness

We implement the exact ITU-R BS.1770-4 standard used by Netflix and Spotify. View Momentary, Short-term, and Integrated LUFS with K-weighted precision.

True Peak Detection

Digital peaks can hide between samples. Our engine uses 4x polyphase sinc interpolation to catch inter-sample clipping (dBTP) that standard meters miss.

Spectral Analysis & RTA

Visualize the frequency domain live. See the Spectral Centroid (brightness), Spectral Flatness (tonality), and a 31-band 1/3-Octave Real-Time Analyzer.

Live Spectrogram

Map time, frequency, and amplitude on a stunning heatmap. Perfect for spotting resonant hums, mechanical whine, or intermittent squeals.

Signal Health

Monitor your acoustic environment's Crest Factor, Peak-to-Loudness Ratio (PLR), Loudness Range (LRA), and automatically estimate the background noise floor.

Stereo Goniometer

If you connect a stereo microphone, visualize the phase correlation and L/R energy balance in real-time to check for mono compatibility.

Carithm AI Diagnostics: Beyond Sound Measurement

Why just measure noise when you can understand it? Carithm is pioneering the field of Acoustic AI. We use the same advanced DSP engine powering our sound meter to diagnose mechanical faults simply by listening to them.

🚗 Car Sound Diagnostics

Upload a recording of your engine. Carithm analyzes the acoustic signature to detect worn serpentine belts, failing alternator bearings, exhaust leaks, and rod knock before they cause a breakdown.

❄️ AC & HVAC Diagnostics

Air conditioners have distinct harmonic profiles. Our AI listens for compressor cavitation, fan motor imbalance, and refrigerant flow anomalies to diagnose HVAC issues instantly.

🧺 Washing Machine Diagnostics

Is that spin cycle too loud? We analyze the vibratory frequency and acoustic rhythm to pinpoint worn drum bearings, loose counterweights, and faulty drain pumps.

Decibel Chart: How Loud Is It?

Use this scale to put your online decibel meter reading in context. Remember that every 3 dB doubles the sound energy.

Common sounds and their typical decibel levels
Level	Sounds like	What it means
30dB	Quiet library, bedroom at night	Very quiet. A good target for sleeping.
60dB	Normal conversation, background music	Comfortable. No risk to hearing.
70dB	Vacuum cleaner, noisy restaurant	Loud enough to be annoying but safe.
85dB	Heavy city traffic, leaf blower	Hearing damage can begin after about 8 hours.
95dB	Motorcycle, power tools	Damage possible in an hour. Wear hearing protection.
110dB	Rock concert, chainsaw	Damage possible in a minute or two.
140dB	Firearm, jet engine	Immediate, permanent damage is possible.

Frequently Asked Questions

How does an online sound meter work?

Your browser asks permission to use your microphone. Once allowed, our advanced Web Audio DSP engine measures the incoming sound many times per second, converting it to precise decibel (dB) and LUFS readings, alongside rich spectral charts.

Is this online decibel meter accurate?

It is highly accurate for relative comparisons, acoustic diagnostics, and general environmental awareness. However, because built-in device microphones are not factory-calibrated, absolute dB values may vary. For strict legal compliance, a Class 1 meter is required.

Can this app diagnose my car or washing machine?

Yes! Carithm specializes in Acoustic AI Diagnostics. Alongside measuring the decibel level, our broader platform analyzes the frequency signature of car engines, HVAC systems, and washing machines to detect mechanical faults.

Does the sound meter record or store my audio?

No. Sound is measured live in your browser and nothing is recorded, uploaded to our servers, or saved. Closing the tab immediately clears the readings.