NoiseTrace - Decibel Meter

Measure the noise. Keep the context.

How loud are your neighbors? How long does renovation noise last? Want to compare sound levels at the same location throughout the day?

NoiseTrace brings together sound-level measurement, audio recording, photos, video and reports to help you understand everyday noise and keep a record of the scene.

LIVE SOUND LEVELS
• View live decibel readings, trends and an FFT spectrum.
• Choose A, C or Z frequency weighting.
• Review equivalent, maximum and minimum sound levels.
• Select a scene reference or set your own value to see when readings rise above it.
• Calibrate readings against an external reference device.

AUDIO, PHOTOS AND VIDEO
• Record audio alongside sound-level changes for later review.
• Take photos with decibel and time overlays.
• Record video with sound and add a decibel overlay.
• Optionally add an approximate location automatically or enter one manually.
• Keep original media for later review and organization.

TIMED MONITORING
• Set a session duration; monitoring ends and saves automatically when time is up.
• Review sound-level trends and session statistics.
• Log events above your reference value to understand changes over time.
• Keep the app in the foreground. Monitoring stops if you lock your device or leave the app.

COLLECTIONS AND REPORTS
• Group measurements from the same location or event into a collection.
• Compare results across different times.
• Create PDF reports with measurement details, statistics and trends.
• Export CSV data for further organization and analysis.
• Export data packages with linked photos, audio and video.

LOCAL RECORDS
• Measurement records are saved on your device by default.
• Revisit historical trends, statistics and linked media.
• Back up and restore your records when moving between devices.
• Edit record names and locations to keep everything organized.

FREE AND ADVANCED EXPORTS
Individual PDF reports and standalone CSV exports are free.

Data-package and batch exports can be unlocked with a Pro membership or rewarded ads. Guests can also unlock exports by watching ads, with no account registration required. Receive up to 5 ad unlocks per day, shared between individual data-package and batch exports.

EVERYDAY USE
Observe and document sound in homes, neighborhoods, renovation sites, offices, study spaces, traffic and other everyday environments.

MEASUREMENT INFORMATION
Results depend on the microphone, device model, calibration and surroundings. NoiseTrace is intended for everyday environmental reference and personal records. It does not replace a professionally calibrated sound level meter or provide certified testing or legal certification. For formal testing, contact a qualified professional service.


Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/