$ open ./soundmeter

Decibel Meter
SoundMeter

A sound level meter in your pocket. Measure ambient noise in real time, record videos with dB data overlaid, then replay, share or export every record to Excel.

./screenshots Privacy Policy Terms of Use
44.1kHzsample rate
A / Cfrequency weighting
6UI languages
0data servers of our own

Features

// core capabilities

realtime_db

44.1kHz sampling with Goertzel band analysis and A / C weighting. The gauge shows current, average, max and min dB plus a live trend line.

db_camera

Burns dB statistics, time, address, coordinates and weather into the video while recording. Front/back camera and flash supported.

history

Every measurement is saved automatically. The detail page charts the dB curve; tap any point to jump to that moment in the video.

export

Bundle an Excel sheet (summary + per-point data), the video and the audio, and send it through the system share sheet.

voice_trigger

Voice-activated recording: when the sound level reaches your threshold (70dB by default, adjustable 40-140dB), a 3-minute recording starts automatically.

i18n

Simplified Chinese, Traditional Chinese, English, Japanese, Korean and Vietnamese.

Screenshots

// captured on a real device

Splash screen
01 / splash

Open and measure

The first launch shows a privacy notice. After you agree, you go straight to the meter. No account needed.

Noise check
02 / noise_check

Live noise check

The gauge shows the current level, with average, maximum, minimum and a real-time curve below.

  • A-weighting: close to human hearing
  • C-weighting: keeps more low frequencies
dB camera
03 / db_camera

dB camera

Measure while you film. dB values, duration, time, place and weather are burned into the video, so the evidence is visible on replay and when shared.

  • Location is optional; recording works without it
History list
04 / history_list

History

All records listed by time with duration and max / average / min dB. Data is stored on your device.

Record detail
05 / history_detail

Chart linked to video

The detail page shows the full dB curve and video playback. Tap anywhere on the curve to seek the video to that moment.

  • Share Excel + video + audio as one bundle
Me page
06 / me

Me

Google sign-in, membership center, rewarded ads for extra record quota, voice-trigger threshold, plus the privacy policy and terms.