STI-PA is the most advanced speech intelligibility process available. It is rapidly being accepted by and required by fire codes in the United States and other countries.

Now, you can have STI-PA on your iOS device. Our version is fully compliant with v4 of the standard (the most recent one).

You get both the single-number value as required by codes, and the octave-band values. You can also view all of the detail on another screen.

The test signal is supplied, and will be available for download from this web site. You can burn it to a CD, or copy it to any audio player.

Click here for the test signal.

We also plan to provide a free app that may be used as a test signal player.

Price: $299 in the US iTunes store, other countries comparable, although the exchange rate is set by Apple. 

Now available in AudioTools 3.7.

See our new demo video: