Spatial Separation Benefit for Unaided and Aided Listening Ahlstrom, Jayne B.; Horwitz, Amy R.; Dubno, Judy R. Ahlstrom, Jayne B.; Horwitz, Amy R.; Dubno, Judy R. Less Ear and Hearing. 35(1):72-85, January/February 2014. Abstract Abstract In Brief In Brief Favorites PDF Get Content & Permissions Abstract: In Brief: Consonant recognition in noise was measured at a fixed signal-to-noise ratio as a function of low-pass-cutoff frequency and noise location in older adults fit with bilateral hearing aids. To quantify age-related differences, spatial benefit was assessed in younger and older adults with normal hearing. Spatial benefit was similar for all groups suggesting that older adults used interaural difference cues to improve speech recognition in noise equivalently to younger adults. Although amplification was sufficient to increase high-frequency audibility with spatial separation, hearing-aid benefit was minimal, suggesting that factors beyond simple audibility may be responsible for limited hearing-aid benefit.