Jack J Wazen1, Soha N Ghossaini, Jaclyn B Spitzer, Mary Kuller. 1. Department of Otolaryngology-Head and Neck Surgery, Columbia University College of Physicians and Surgeons, Columbia University Medical Center, New York, New York 10032, USA.
Abstract
OBJECTIVES: Patients with unilateral hearing loss report difficulty hearing conversation on their impaired side, localizing sound, and understanding of speech in background noise. The bone-anchored cochlear stimulator (BAHA) (Entific, Gothenburg, Sweden) has been shown to improve performance in persons with unilateral severe-profound sensorineural loss (USNHL). The purpose of this study is to evaluate the effectiveness of BAHA in sound localization for USNHL listeners. STUDY DESIGN: Prospective study of 12 USNHL subjects, 9 of whom received implants on the poorer hearing side. A control group of 10 normal hearing subjects were assessed for comparison. Localization with and without BAHA was assessed using an array of 8 speakers at head level separated by 45 degrees. Error analysis matrix was generated to evaluate the confusions, accuracy in response, and laterality judgment. RESULTS: The average accuracy of speaker localization was 16% in the unaided condition, with no improvement with BAHA use. Laterality judgment was poorer than 43% in both aided and nonaided conditions. CONCLUSIONS: Patients with UNSNHL had poor sound localization and laterality judgment abilities that did not improve with BAHA use.
OBJECTIVES:Patients with unilateral hearing loss report difficulty hearing conversation on their impaired side, localizing sound, and understanding of speech in background noise. The bone-anchored cochlear stimulator (BAHA) (Entific, Gothenburg, Sweden) has been shown to improve performance in persons with unilateral severe-profound sensorineural loss (USNHL). The purpose of this study is to evaluate the effectiveness of BAHA in sound localization for USNHL listeners. STUDY DESIGN: Prospective study of 12 USNHL subjects, 9 of whom received implants on the poorer hearing side. A control group of 10 normal hearing subjects were assessed for comparison. Localization with and without BAHA was assessed using an array of 8 speakers at head level separated by 45 degrees. Error analysis matrix was generated to evaluate the confusions, accuracy in response, and laterality judgment. RESULTS: The average accuracy of speaker localization was 16% in the unaided condition, with no improvement with BAHA use. Laterality judgment was poorer than 43% in both aided and nonaided conditions. CONCLUSIONS:Patients with UNSNHL had poor sound localization and laterality judgment abilities that did not improve with BAHA use.
Authors: Martijn J H Agterberg; Ad F M Snik; Myrthe K S Hol; Thamar E M van Esch; Cor W R J Cremers; Marc M Van Wanrooij; A John Van Opstal Journal: J Assoc Res Otolaryngol Date: 2010-09-14