Pathological binaural phase time delay (BPTD) asynchrony is measured at a variety of frequencies and to speech stimuli to develop a BPTD profile for a subject. Then a corrective device ( 600, 1000 ) is designed to apply clinical BPTD to compensate for the subject's pathological BPTD. An electronic device ( 500 ) is used to measure the subject's ability to comprehend words at a variety of relative time delays between ears to estimate the ideal overall relative time delay. The optimal relative phase shift at a variety of frequencies is also measured. An electronic device ( 600 ) 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 ( 1000 ) may be used to correct smaller amounts of BPTD.
Apparatus and methods for mitigating impairments due to central auditory nervous system binaural phase-time asynchrony