Decibel Diary: Sound Meter

Discover how loud your surroundings are with Decibel Diary, a practical sound meter and noise exposure diary.

Use your phone's microphone to estimate environmental noise levels in decibels (dB), monitor sound changes in real time, and save measurement sessions for later review.

Whether you're checking noise at home, working in an office, traveling through traffic, or visiting a busy restaurant, Decibel Diary helps you understand and track the sounds around you.

LIVE DECIBEL METER

• View approximate sound levels in real time.
• Monitor noise with a clear, easy-to-read dB gauge.
• See minimum, average, and maximum sound levels.
• Follow changes using a live sound level graph.
• Explore relative frequency patterns with the optional frequency balance view.

SAVE SOUND MEASUREMENTS

Record and organize your noise measurements to build a personal sound diary.

• Start and stop measurement sessions.
• Save measurements with their duration and statistics.
• Organize sessions by environment, including home, office, traffic, restaurants, and more.
• Add personal notes to saved measurements.
• Review detailed sound level graphs for previous sessions.

TRACK YOUR NOISE HISTORY

Go beyond a simple decibel reading and see how your sound environment changes over time.

• Browse your saved measurement history.
• Search for specific sessions.
• Filter measurements by environment.
• View your total logged noise measurement time over the last seven days.
• Compare sound levels across different places and sessions.

UNDERSTAND YOUR EVERYDAY ENVIRONMENT

Use Decibel Diary to:

• Compare noise levels in different rooms.
• Check background noise while studying or working.
• Observe sound levels during daily commutes.
• Monitor noise in restaurants and public spaces.
• Keep a personal record of noisy environments.
• Explore changes in sound levels throughout your day.

SIMPLE AND PRACTICAL

Decibel Diary combines a real-time noise meter with organized measurement history in one straightforward app.

Your saved sessions include sound statistics and measurement information. Raw microphone audio is not saved as a recording.

IMPORTANT INFORMATION

Sound measurements are approximate and depend on your phone's microphone, hardware, and surrounding conditions.

Decibel Diary is not a certified sound level meter and should not replace professional measuring equipment for legal, medical, or occupational safety purposes.

Logged measurement time does not represent a certified noise exposure dose.

Start measuring the sound around you and build your personal noise diary with Decibel Diary.