dB Volume Meter в Android Market

dB Volume Meter (v. 1.0) Разработано Darren Gates

This is a fun way to measure volume levels by displaying the output in decibel (dB) format. The values shown are approximate, and should not be used in industrial applications. Features include: max, min, and average values, calibration settings, and microphone #1/#2 saved settings (for internal/external mics).