Comparison of Baha and CROS Hearing Aid in Single-Sided Deafness

Abstract

Nine adults with single-sided deafness previously implanted with a Baha were given a two-week trial with a CROS hearing aid and tested in unaided and aided conditions. Both devices were compared on head shadow effect reduction, speech perception measures, self-assessment questionnaires, and daily diaries. The CROS reduced the head shadow effect for more frequencies than the Baha. Participants performed well across all conditions with speech to the poor ear in quiet. The QuickSIN showed both devices adversely affected speech perception with noise to the poor ear; the CROS was more disadvantageous. Neither device improved speech perception with noise to the better ear. The BBSS and SSQ demonstrated subjective benefit and the diaries indicated frequent use of both devices. Five participants preferred the CROS for sound quality; three preferred the Baha for comfort. As both devices seem comparable, a CROS should be the first intervention option recommended before considering Baha surgery.