sentence: There are situations in which even normal-hearing percepts become noticeably inaccurate ( e.g ., in large amounts of reverberation or at adverse signal-to-noise ratios [ SNRs ] ) , entirely wrong ( e.g ., perceiving a source to be behind when it was really in front ) , or overridden by vision ( e.g ., ventriloquism ) , and in many of these domains there is experimental evidence that hearing-impaired listeners perform even less well .