Tempo tool
BPM tapper
Tap along with music to find tempo in beats per minute. The calculator smooths recent taps and resets automatically after a pause.
Taps0
Beat length-- ms
Stability--
Microphone sound meter
dBmeter online decibel meter
Measure sound from your microphone immediately, then use professional browser tools for tempo, tones, pitch, frequency, and waveforms.
- Runs locally
- No audio upload
- Calibration control
- Mobile friendly
Current level
Idle
Microphone analysis runs on this device. On phones, use the deployed HTTPS site or same-device localhost for microphone access.
dB level and frequency spectrum
Low--
Mid--
High--
Average
-- dB
Peak
-- dB
Noise range
--
Practice clock
Metronome
Run a clean browser metronome with accent beats for practice, production checks, and tempo matching.
1
Reference audio
Tone generator
Create sine, square, triangle, or sawtooth tones for speaker checks, room tests, instrument tuning, and audio education.
Tuning utility
Pitch detector
Detect the dominant musical pitch from your microphone for quick tuning checks and audio education.
-- Hz
Cents--
Confidence--
SourceMic
Wave education
Waveform illustrator
Explore how frequency, amplitude, and phase change a waveform. This visual tool is synthetic and works without microphone permission.
Hearing safety
Noise exposure calculator
Estimate daily sound exposure from level and duration. This is an educational calculator, not a substitute for occupational noise monitoring.
Estimated dose
8%
At 80 dB for 2 hours, this is below a common daily exposure reference.
Online sound meter guide
Use dBmeter for fast sound checks
dBmeter is built for people searching for a decibel meter, sound meter, dB meter, noise meter, frequency analyzer, BPM tapper, tone generator, or pitch detector that works instantly in a browser. The main decibel meter stays first on the page because measuring sound is the core task.
Decibel meter
Measure estimated sound level from your microphone with current, average, peak, and noise range readouts. Use calibration when you need readings to match a trusted SPL meter.
Frequency analyzer
See low, mid, and high frequency energy inside the same meter view, useful for room noise, speaker tests, voice checks, appliance hum, and audio troubleshooting.
Audio generators
Use the tone generator and waveform illustrator to understand sine, square, triangle, and sawtooth waves without installing a separate app.
Music tools
Tap BPM, run a metronome, or detect pitch from the microphone when practicing, mixing, teaching, tuning, or matching tempo by ear.
Sound level basics
What a decibel meter tells you
Decibels are logarithmic, so a small numeric change can represent a large change in acoustic energy. Use the meter for quick checks, comparisons, and learning. Use a calibrated class 1 or class 2 instrument when a legal, medical, or occupational measurement matters.
For home and office
Check background noise, compare rooms, identify loud appliances, and document before-and-after acoustic changes.
For creators
Set repeatable recording conditions, look for clipping risk, and use tones to test speakers, headphones, and signal chains.
For classrooms
Visualize waveforms, connect frequency to pitch, and show why doubling perceived loudness is not the same as adding 1 dB.
For musicians
Tap tempo, run a metronome, detect pitch, generate reference tones, and check room loudness from one mobile-friendly page.
Questions people ask
Decibel meter FAQ
Is dBmeter a real sound meter?
dBmeter uses the browser microphone and Web Audio API to estimate sound level. It is useful for everyday comparisons, education, and quick checks. Certified class 1 or class 2 meters are still required for legal, medical, or occupational measurements.
Why do phones show different dB readings?
Microphones, operating systems, cases, input gain, automatic processing, and browser behavior differ by device. The calibration slider helps align dBmeter with a known reference meter.
Does the microphone audio leave my device?
No. The decibel meter, spectrum analyzer, and pitch detector run locally in the browser. Audio is not uploaded to a server.
Can I use dBmeter on iPhone and Android?
Yes. Use the HTTPS site on the same phone or tablet. Mobile browsers require a direct tap before microphone or audio playback can start.