Patent ID: 6956955
Filing Date: 2005-10-18
Classification: H04S

Abstract:
1. A speech-based virtual audio distance display device comprising: a first external input comprising a control computer interface that determines a desired distance of a simulated sound source from an external system driving said display; a second external input comprising operator selection of a desired listening level; a non-volatile memory device storing a plurality of pre-recorded speech signals; a variable mode vocal effort processor determining an appropriate pre-recorded speech signal for a specific application from said non-volatile memory device storing a plurality of pre-recorded speech signals based on said first and second external inputs; a synthesized speech utterance absolute output level controlling calibration factor scaling said appropriate pre-recorded speech signal output to a listener in accordance with said second external input; and a head related transfer function virtual audio display processing a signal output from said synthesized speech utterance output level controlling calibration factor and presenting said signal to a listener via headphones.