LEQ Graph 1.0


Category: Music
Price: $9.99 (iTunes)

Description:

LEQ 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.

LEQ 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.

You can scroll and scale the graph vertically, in dB, by using standard swipe and pinch gestures. You can also scroll and expand and contract the time axis using gestures. Zoom out to a full 24 hours, or zoom in to a single minute, showing second resolution. Double-tap the screen to zoom out to show the entire graph on the screen.

The time scale grid changes dynamically, highlighting minutes, ten-minute, and hour lines as as it runs.

As the graph runs, the overall LEQ for the entire time period is computed and displayed on the screen. Swiping across the graph brings up a cursor that displays the exact dB level and time for any point on the graph.

If you exit the app, or are interrupted with a phone call, the graph data will not be lost. LEQ Graph will automatically save the graph, and reload it when you next open the program. You can also save a graph in one of ten files on the iPhone, so that you can recall the graph later.

LEQ Graph supports storing of its screen to your photo roll.

The filters are all ANSI type 1 or better, and include A-weighting, C-weighting, and all octaves band filters from 32 to 16kHz.

Like all Studio Six Digital audio apps, LEQ Graph supports calibration. The app ships calibrated for a typical iPhone 3G. If you have access to a calibrated SPL meter you can calibrate your iPhone.

You can use LEQ Graph on an iPod Touch second generation by using a headset microphone. If you have first generation Touch, you can use the app only with a third-party microphone input adapter. See our web site for more detail.

Also, see our other great audio and acoustical analysis apps: SPL, RTA, ETC, RT60, FFT, Generator, and Speaker Pop.

And, if you are looking for great audio test equipment, check out the Sencore SoundPro line of analyzers.


LEQ Graph



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