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Introducing Decibel Meter — a real-time sound level meter. Live analog gauge, accurate dB-A/B/C/Z weighting via on-device FFT, Fast/Slow response modes, 3-point calibration, export to PDF/CSV/image, reference chart, dark/light themes.
Measure sound level in dBA/dBC with calibration, live graph & PDF/CSV export
Decibel Meter measures the sound level around you in real time using your phone's microphone. See the noise level in decibels (dB) on an analog gauge, a big digital readout and a live graph. Perfect for checking how loud a room, a street, a party or a machine is. 📊 SOUND LEVEL METER • Live dB reading on a colorful analog gauge and digital display • Min, Max and Average dB for the whole measurement • Live timeline graph of the noise level • Range 0–120 dB 🎚 FREQUENCY WEIGHTING – dB-A, dB-B, dB-C, dB-Z Switch between A, B, C and Z weighting, applied with a real FFT frequency analysis – not just a fixed offset. Use dBA for everyday noise and dBC for bass and low-frequency sound, like music or motorcycles. ⏱ FAST & SLOW RESPONSE Fast (125 ms) for quick changes, Slow (1 s) for a steadier reading. 🎯 CALIBRATION Phone microphones differ. Use the calibration wizard and guide to adjust the reading, or fine-tune the microphone sensitivity yourself. Your calibration is saved on your device. 📋 NOISE REFERENCE CHART Compare your reading with everyday sounds to understand how loud it really is. 📤 EXPORT & SHARE Save your measurements as a PDF report, a CSV file or an image snapshot and share them with anyone. 🌙 EXTRAS • Dark and light mode • Keep the screen on while measuring • Works offline – no internet needed to measure • No sign-up, no account USE IT FOR • Checking noise at home, at the office or in the classroom • Measuring how loud music, a party or a concert is • Comparing the sound of different rooms, appliances or engines • Curious about the noise around you? Just open it and measure IMPORTANT This app uses your phone's built-in microphone, which is not a professional instrument. Readings are an estimate and can differ from a certified sound level meter, especially at very high or very low levels. Do not rely on it for medical, legal or safety decisions. The audio is analyzed on your device only – it is not recorded, saved or sent anywhere. Download Decibel Meter and measure the sound level around you in one tap.