Decibel Meter: Sound Level App

Measure the sound around you with a simple, accurate decibel meter — from a quick noise check to real acoustic analysis.

Decibel Meter: Sound Level App turns your Android phone into a practical sound level meter (SPL meter) for checking environmental noise in real time. See the current sound level in decibels (dB) and quickly understand how loud your surroundings are — whether you just want a number or a full frequency breakdown.

Whether you want to check noise at home, measure traffic or appliances, compare different environments, monitor a workplace, or simply understand the sounds around you, this sound meter and noise detector gives you a clear view of the current noise level.

KEY FEATURES

- Real-time sound measurement
See the current sound level in decibels (dB) as the environment changes.

- A, C and Z frequency weighting
Switch between dB(A), dB(C) and unweighted dB(Z) readings, just like a professional sound level meter.

- Minimum, average and maximum levels
Track important sound level values during your measurement session.

- Sound level history graph
Visualize how noise changes over the last 60 seconds with an easy-to-understand graph.

- Live frequency spectrogram
See how sound energy is distributed across frequencies in real time.

- Octave band spectrum
View sound levels across standard octave bands, from 31.5 Hz to 8 kHz.

- NR and NC room ratings
Check Noise Rating (ISO) and Noise Criterion (ANSI) curves for room acoustics and HVAC noise assessments.

- Calibration
Fine-tune readings against a reference sound level meter for more consistent measurements.

- Noise reference levels
Compare measured sound with familiar everyday environments to better understand what the dB value means.

- Simple controls
Start, pause, reset and manage measurements without complicated settings.

USE IT FOR

- Checking noise at home or in an apartment
- Measuring traffic and outdoor noise
- Checking appliances, fans and air conditioners
- Comparing rooms and different environments
- Monitoring office and workplace noise
- Checking classrooms and study spaces
- Measuring sound at concerts and events
- Basic room acoustics and HVAC noise checks (NR/NC)
- Exploring everyday sound levels and noise pollution

ABOUT ACCURACY

This app uses your device's microphone to estimate environmental sound levels. Smartphone microphones and audio hardware differ between devices, so measurements can vary from one phone to another.

For the best results, keep the phone in a consistent position and use the calibration option when comparing measurements. The app is intended for everyday, educational and informational use and should not be considered a certified professional sound level meter.

PRIVACY FIRST

Sound is processed on your device for the moment of measurement only. Nothing is recorded, no account is required, and nothing is sent to the cloud.

A practical dB meter and noise level meter for everyday noise checks, sound pressure level (SPL) measurements, and understanding the environment around you.

Measure sound. Understand noise. Keep track of your sound levels.

Recent changes:
* Minor improvements