SPL Graph is an audio level chart recorder for the iPhone and iPod Touch. It works by averaging the SPL for one second, applying an optional weighting filter, and plotting the sound level. You can optionally record the audio for the graph, and even email graph results at the end of a test. With our Remote SPL Logging, and Octave and 1/3 Octave Band Logging options, you have the power of the most sophisticated logging sound level meters available on the iOS platform.

SPL Graph can record up to 24 hours of sound level data, with single second resolution. The graph starts with a one-minute window, and as a minute is recorded, the graph re-scales automatically and adds another minute to show the data collected so far.