Decibel Meter: dB & SPL Meter

Turn your Android phone into a responsive decibel meter and sound level meter. Measure ambient noise in real time, monitor frequency bands, receive instant high-noise warnings, and save timestamped acoustic reports.

Whether you are checking apartment noise, testing home theater acoustics, monitoring baby nursery levels, or tracking workplace sound exposure, Decibel Meter gives you clear, reliable dB SPL readings at a glance.

KEY FEATURES

• Real-Time dB SPL Radial Gauge (20–130 dB)
Track live sound pressure levels with Minimum, Average, Maximum, and Peak dB statistics. Built-in real-world noise references (from a quiet library at 40 dB to city traffic at 80 dB and power tools at 100 dB) and safe hearing exposure time estimates based on WHO and NIOSH guidelines help you understand when hearing protection is needed.

• 60-Second Rolling Timeline & Interactive Demo
Watch ambient sound fluctuations over a live 60-second waveform chart, pause or reset your session anytime, or explore the meter using the built-in interactive demo mode.

• 8-Band Octave Spectrum Analyzer (Pro)
Switch from the time-domain waveform to an 8-band Octave frequency analyzer (63 Hz to 8 kHz) to identify low-frequency rumble, HVAC hum, or high-frequency noise sources.

• Custom Noise Threshold Alerts (Pro)
Set a custom decibel limit or choose one-tap environment presets—Nursery (50 dB), Quiet Office (60 dB), Home (70 dB), City Traffic (80 dB), or OSHA Workplace (85 dB)—to receive instant visual and haptic warnings when ambient noise crosses your threshold.

• Precision Microphone Calibration & Weighting (Pro)
Fine-tune your device microphone with a ±25.0 dB calibration offset to match an external reference SPL meter, and switch between Fast (125 ms) and Slow (1.0 s) response time weighting.

• Timestamped Noise Records & Report Export (Pro)
Save measurement sessions with custom titles, notes, duration, and Min/Avg/Max/Peak dB readings. Export formatted text reports in one tap to document noise disturbances or acoustic checks.

100% ON-DEVICE AUDIO PRIVACY
Your privacy comes first. Microphone audio samples are processed strictly in memory on your device to calculate decibel levels in real time—audio is never recorded to disk or uploaded to any server.

SUBSCRIPTION INFORMATION
Decibel Meter offers auto-renewing Pro subscriptions (Weekly, Monthly, and Yearly plans, with optional trial offers where available) that unlock the 8-band Octave spectrum analyzer, unlimited noise records and report exports, custom threshold alerts, ±25 dB calibration, and an ad-free experience. Subscriptions are billed through your Google Play account and renew automatically unless canceled at least 24 hours before the end of the current billing period.

SUPPORT & LEGAL
• Support: camillelabs9@gmail.com
• Privacy Policy: https://camillelabs.com.au/privacy.html
• Terms of Use: https://camillelabs.com.au/terms.html

Recent changes:
UX Improvement