Currently an Advanced Research & Development project. This patented technology addresses pathological binaural phase time delay (BPTD) asynchrony, which is measured at a variety of frequencies and to speech stimuli to develop an individual BPTD profile. Then, a corrective device is designed to apply a clinical BPTD to compensate for the subject’s pathological BPTD. An electronic device is used to measure the listener’s ability to comprehend words at a variety of relative time delays between ears to estimate the ideal overall relative time delays. The optimal relative phase shift at a variety of frequencies is also measured. An electronic device may be used to correct the pathological BPTD by delaying sound in different frequency bands differently to the target ear, according to the BPTD profile, or a passive filtered earplug may be used to correct smaller amounts of BPTD.