Noise Diary: dB Log

Measure a noise event and keep approximate Leq, maximum, minimum, tags, and notes on your device—without creating or uploading an audio recording.

Noise Diary is a focused tool for measuring environmental sound and saving the moment as a noise event.

What you can do:

• See an approximate dB(A) reading
• Start and end an event to save Leq, maximum, and minimum
• Add a tag and notes
• Review a local timeline
• Export CSV and PDF
• Apply local calibration using a reference sound level meter
• Continue only an event you started while the screen is locked or another app is open

Privacy first:

• Analysis runs on your device
• No audio recording is created
• Audio and measurements are not uploaded
• No background measurement outside an event you start

Important: Readings are approximate values calculated from the iPhone microphone. Noise Diary is not an IEC-compliant professional sound level meter. Do not use it for legal, health, hearing-safety, or workplace-compliance decisions.