title: Amplification of transcutaneous and percutaneous bone-conduction devices with a test-band in an induced model of conductive hearing loss.
abstract: Transcutaneous devices have a disadvantage, the dampening effect by soft tissue between the bone and devices. We investigated hearing outcomes with percutaneous and transcutaneous devices using test-bands in an induced unilateral conductive hearing loss.
  
  
  
  Comparison of hearing outcomes of two devices in the same individuals.
  
  
  
  The right ear was plugged in 30 subjects and a test-band with devices (Cochlear™ Baha® BP110 Power and Sophono® Alpha-2 MPO™) was applied on the right mastoid tip with the left ear masked. Sound-field thresholds, speech recognition thresholds (SRTs), and word recognition scores (WRSs) were compared.
  
  
  
  Aided thresholds of Sophono were significantly better than those of Baha at most frequencies. Sophono WRSs (86 ± 12%) at 40 dB SPL and SRTs (14 ± 5 dB HL) were significantly better than those (73 ± 24% and 23 ± 8 dB HL) of Baha. However, Sophono WRSs (98 ± 3%) at 60 dB SPL did not differ from Baha WRSs (95 ± 12%).
  
  
  
  Amplifications of the current transcutaneous device were not inferior to those of percutaneous devices with a test-band in subjects with normal bone-conduction thresholds. Since the percutaneous devices can increase the gain when fixed to the skull by eliminating the dampening effect, both devices are expected to provide sufficient hearing amplification.
authors.affiliation: a Department of Otolaryngology , Asan Medical Center, University of Ulsan, College of Medicine , Seoul , Korea and.
authors.forename: Marn Joon
authors.initials: MJ
authors.lastname: Park
authors.affiliation: a Department of Otolaryngology , Asan Medical Center, University of Ulsan, College of Medicine , Seoul , Korea and.
authors.forename: Jae Ryung
authors.initials: JR
authors.lastname: Lee
authors.affiliation: a Department of Otolaryngology , Asan Medical Center, University of Ulsan, College of Medicine , Seoul , Korea and.
authors.forename: Chan Joo
authors.initials: CJ
authors.lastname: Yang
authors.affiliation: b Department of Otolaryngology , Kyungpook National University, College of Medicine , Daegu , Korea.
authors.forename: Myung Hoon
authors.initials: MH
authors.lastname: Yoo
authors.affiliation: a Department of Otolaryngology , Asan Medical Center, University of Ulsan, College of Medicine , Seoul , Korea and.
authors.forename: In Suk
authors.initials: IS
authors.lastname: Jin
authors.affiliation: a Department of Otolaryngology , Asan Medical Center, University of Ulsan, College of Medicine , Seoul , Korea and.
authors.forename: Chi Ho
authors.initials: CH
authors.lastname: Choi
authors.affiliation: a Department of Otolaryngology , Asan Medical Center, University of Ulsan, College of Medicine , Seoul , Korea and.
authors.forename: Hong Ju
authors.initials: HJ
authors.lastname: Park
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D001844:Bone Conduction; D032882:Comprehension; D012048:Correction of Hearing Impairment / Q000295:instrumentation*; D004867:Equipment Design; D005260:Female; D006310:Hearing Aids; D006314:Hearing Loss, Conductive / Q000175:diagnosis / Q000503:physiopathology / Q000523:psychology / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D019986:Persons with Hearing Disabilities / Q000523:psychology / Q000534:rehabilitation*; D013065:Speech Intelligibility; D013067:Speech Perception; D013069:Speech Reception Threshold Test; D055815:Young Adult
keywords: Bone-conduction; conductive; hearing aids; hearing loss; hearing rehabilitation