Sound Meter: dB & Noise Level

How loud is it, really? Sound Meter turns your iPhone into a decibel meter and shows noise the way you feel it: a live sound terrain that rises and turns from blue to red as it gets louder. Compare nearby streets before you rent, see when the noise hit during the night, and follow your noise dose while you measure. Nothing is recorded: sound is measured on your device and stays there. DECIBEL METER • Live dB(A) reading with min, max and Leq • A sound level meter you read at a glance: color and height follow the level • Everyday comparisons, from a library to a motorcycle • Calibrate it against a reference meter OSCILLOSCOPE & SPECTRUM ANALYZER • See the sound wave itself on a live oscilloscope • A spectrum analyzer with a live column for every frequency band • A needle gauge when you just want a quick read NOISE MAP • Estimated daytime traffic noise on the streets around you, in 5 dB bands • Tap the map for the estimate and the main road type • Pin your own measurements: 5 seconds is enough • The layer is a model from road types, always labelled as an estimate. Your measurements are the real thing SLEEP NOISE MONITOR • Logs the noise in your bedroom all night • Morning report with a quiet score, a timeline and each noise event above your threshold • Keep a log of your nights HEARING DOSE • Daily noise dose from the time you measure, based on NIOSH limits • Time left at the current level • The dose bar turns amber at half the allowance and red at the limit ROOM SCORE • A comfort score for any room from a 30-second reading • Compared with published WHO and NIOSH limits for sleep, focus and hearing, plus a rule of thumb for conversation MORE TOOLS • Noise alarm with your own threshold • Live graph and spectrogram • Sound type estimate (beta) from loudness patterns • Home Screen widgets • Live Activity on the Lock Screen and in the Dynamic Island • dB camera: photos with the level on them • History with CSV export • 8 languages Phone microphones give approximate readings. Sound Meter is not a certified instrument and does not replace an official measurement or medical advice. It is not affiliated with WHO or NIOSH. FREE & PRO The core decibel meter is free: sessions up to 2 minutes, up to 5 saved measurements, and the surface and gauge views. The oscilloscope, spectrum and live graph are open for your first 3 days. Sound Meter Pro unlocks unlimited session length, the oscilloscope, live graph and spectrum, sleep monitor, noise alarm, sound type estimate, noise map, room score, unlimited history, CSV export and an ad-free experience. New subscribers may qualify for a free trial: the plan screen shows the exact offer before you confirm. Payment is charged to your Apple ID account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/soundmeter1-privacy