Sound level measurement
Track sound levels and their changes over time. A, C and Z frequency weightings and Fast or Slow time weightings.
SOUND LEVEL METER & AUDIO ANALYZERMeasure sound.
Measure sound.
Understand noise.
Turn your Android phone into a sound observation tool: real-time levels, LAeq indicators and octave-band analysis. Free, with no ads.
FreeNo adsFor Android
Sound Analyzer◉ ● ●
SOUND LEVEL
64.2 dB(A)
LAF · FAST
Level over time30 s
Instantaneous64.2
Average (LAeq)61.8
A · C · Z | FAST · SLOW
Interface illustration — not a live measurement
PRACTICAL, FOCUSED FEATURES
From sound levels
to spectral analysis
Clear acoustical indicators to explore your sound environment with a more informed approach.
Octave-band spectra
Explore the frequency distribution in octave and one-third-octave bands with weighting and averaging options.
Microphone calibration
Adjust microphone sensitivity to bring displayed levels closer to a reference sound level meter.
Energy-based indicators
Read equivalent continuous sound level LAeq, sound exposure level LAE and other useful indicators.
Made for learning
Explore decibels, weightings and frequency bands with useful educational applications.
No ads or tracking
No ads or analytics tracking on this website. The app uses the microphone to calculate acoustic indicators, without storing the raw audio signal.
WHO IS IT FOR?
A closer look at your sound environment.
The app can help observe sound phenomena and illustrate acoustic concepts. It is not intended to replace an approved sound level meter.
Understand the measurement limits ↗Education & training
Explore sound levels, decibels and octave bands.
Environmental sound observation
See how sound levels change over time.
Exploratory analysis
Identify frequency regions that contribute to a sound.
GETTING STARTED
Three steps to get started
Start exploring acoustical indicators in just a few minutes.
01
Install the app
Download Sound Analyzer App from Google Play on your Android device.
02
Check calibration
For better agreement, compare the reading with a reference sound level meter when possible.
03
Observe & analyze
Choose suitable indicators and move from time history to band analysis.
Important: smartphone microphones are not designed for regulatory acoustic metrology. Accuracy depends on the device, audio processing and calibration. Use an approved sound level meter whenever regulatory compliance is required.
LEARN MORE
Frequently asked questions
Key points to know before measuring.
Can this replace an approved sound level meter?
No. The app is intended for indicative measurements and educational use. It does not claim compliance with any sound level meter accuracy class.
Why calibrate the microphone?
Microphones and audio processing vary between smartphones. Calibration can adjust sensitivity, but cannot remove every frequency-response or dynamic-range limitation.
Does the app record conversations?
No. The microphone signal is processed to calculate acoustical indicators and is not stored as an audio recording.
What is the difference between LAF and LAeq?
LAF is an A-weighted level with Fast time weighting. LAeq is an energy-equivalent average level over a measurement interval.
What is a one-third-octave spectrum?
It divides the acoustic signal into standardized frequency bands to identify which regions contribute most to the overall sound level.
FREE · ANDROID
Curious about sound?
Start analyzing.
Discover Sound Analyzer App on Google Play.