The Weber test reflects "conduction loss" in the ipsilateral ear because, in the event of impaired conduction, ipsilateral sensorineural hearing is perceived as louder; this is the same reason humming becomes more salient when covering the ears. If the Weber-lateralized ear has a positive Rinne test (AC>BC), that generally means the absence of conduction loss in that ear, and the reason sound had been perceived as louder on that side is because a sensorineural loss is present contralaterally; an ipsilateral negative Rinne test (BC>AC), on the other hand, would confirm ipsilateral conductive hearing loss (although contralateral sensorineural hearing loss may "still" be present. If the Weber-lateralized ear has a positive Rinne test and the contralateral ear has a negative Rinne test, then both conductive and sensorineural hearing loss are present in the contralateral ear. This is because sensorineural deficits always take auditory precedence over conductive ones, so even though conductive hearing loss is present in the contralateral ear, it is the sensorineural deficit that is responsible for the ipsilateral perceived elevation of volume. This also means that a Weber-lateralized ear with bilateral negative-Rinne corresponds to only sensorineural hearing on the ipsilateral side "not" being affected.