SoundPro Speech Intelligibility Firmware
Speech Intelligibility Submenu: Appears when the Noise Tools selection is made in the main menu. This submenu shows the Speech Intelligibility test functions available on the Audio Integrator and Audio Consultant. The ALCONS, RaSTI, and STI-PA are speech intelligibility tests that gauge how discernable speech is at a particular position in a room in respect to the speaker.
Electronic speech intelligibility tests determine whether rooms and public address systems can adequately transmit speech that can be understood. Tests accurately quantify the performance of the sound system and environment in which they operate. Results clearly identify if improvement is needed or if performance criteria is meet.
Electronic measurement of speech intelligibility has evolved in understanding and testing sophistication. There are currently three common testing methods used to gauge speech intelligibility using electronic analysis. They include:
1. % ALCONS (Percentage Articulation Loss of Consonants)
2. RaSTI (Rapid Speech Transmission Index)
3. STI-PA (Speech Transmission Index for Public Address Systems)
Speech Intelligibility testing (RaSTI, STI-PA) involves introducing a test signal into the room and performing electronic analysis at the listening position.

