Only the current version so far — new entries appear as the app ships updates.
DBA Sound Meter: Sound Measure is a tools app by Galaxy studio apps with 500,000+ downloads (about 573K estimated). +414 installs in the last 7 days. Rated 3.7 from 3K ratings. Released May 2, 2013. Install growth, rank history, SDKs and ad networks.
From the store listing: “Use the DBA Sound Meter: DB Meter App to measure sound in decibels anytime!”