Sound Meter: Decibel Meter dB

Sound Meter turns your phone into a decibel meter. See how loud it really is in your bedroom, office, classroom, street or at a concert, and find out whether the noise around you is safe for your hearing.

Measure
• Large, easy-to-read dial with the live level in dBA
• Minimum, average and maximum since you started
• The average is a true Leq, the energy average that noise rules use
• Live chart of the last minute
• Pause and reset at any time

Understand
• Every reading comes with an everyday example: a quiet library, normal conversation, city traffic, a concert…
• A noise level guide explains each range and how long it is safe to listen

Save and share
• Save a measurement with its chart and statistics
• Rename, review and delete your history
• Share the result as text in one tap

Accurate settings
• A-weighting (dBA, how the ear hears) or Z-weighting (dBZ, flat)
• Fast or Slow response, as on professional meters
• Calibration from -20 to +20 dB to match a reference meter
• Keep the screen on while measuring

Loudness alarm
Set a limit and your phone vibrates and flashes when the noise goes above it. Great for nurseries, home studios, workshops and checking the neighbours.

Private
Sound Meter only measures loudness. No audio is ever recorded, stored or uploaded, and it stops listening as soon as you leave the app.

Sound Meter Pro
One payment removes all ads and unlocks the loudness alarm forever. Or watch a short video to use the alarm free for 24 hours.

Note: phone microphones are not certified sound level meters. Readings are a good guide, usually within a few dB; use calibration for best results.