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Noise detector & sound level meter — measure dB SPL around you in real time.
Sound Meter turns your phone into a fast, accurate decibel meter and noise detector. Measure the sound around you in dB SPL with a clean, live gauge and a rolling chart of the last 60 seconds. Whether you're checking traffic noise, workplace sound levels, a noisy room, or how loud your music really is, Sound Meter shows the answer in real time. FEATURES • Real-time decibel readings (dB SPL) with a smooth gauge • Live chart of the last 60 seconds so you can see how sound changes • MIN, AVG, MAX values to track the loudest and quietest moments • Built-in noise reference — compare your reading to everyday sounds (whisper, conversation, traffic, concert…) • Dark mode by default, light and system themes available • Switch between dB and B units • Keep screen on while measuring • Pause, resume and reset any time TYPICAL USES • Measure noise at home, at work, or in restaurants • Check the volume of speakers, headphones or your music • Monitor sound levels in a classroom or meeting room • See how loud a neighbor or nearby construction really is ACCURACY Readings come from your device's microphone and match consumer sound meters closely on most phones. For legal or safety-critical measurements, use a certified sound level meter. PRIVACY Sound Meter only uses the microphone to compute the sound level. No audio is recorded, stored, or sent anywhere.