Patent ID: 7702112
Filing Date: 2010-04-20
Classification: G08B,H04R

Abstract:
1. A system comprising: a plurality of loud speakers that emit intelligibility test signals throughout a region; a plurality of fixedly mountable microphones that receive audio input corresponding to the intelligibility test signals based upon their respective physical relationship with the members of the plurality of speakers; circuits coupled to respective microphones including circuitry that automatically detects a received signal at a predetermined time, analyzes the received signal by comparing a depth of modulation thereof with a test signal in each of a plurality of frequency bands, evaluates intelligibility of audio received by the respective microphones based upon the comparative depth of modulation where reduction in modulation depth of the received signal is associated with loss of intelligibility and generates an indicator of intelligibility on a per microphone basis, the circuits each include a network output port and which includes a plurality of ambient condition detectors with at least some of microphones carried by respective ones of the detectors.