Objective verification of audibility in bone conduction devices.

Objective: To objectively measure audibility in patients wearing bone conduction devices (BCDs) with a new approach using a skin microphone at the patient's forehead. Design: The skin microphone was attached by a softband and shielded by an earmuff. This set-up was confirmed not to be influenced by...

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Published in:International Journal of Audiology Vol. 64; no. 3; pp. 217 - 224
Main Authors: Persson, Ann-Charlotte, Håkansson, Bo, Fredén Jansson, Karl-Johan, Reinfeldt, Sabine, Eeg-Olofsson, Måns
Format: pictorial research tables/charts Journal Article
Published: Taylor & Francis Ltd Mar2025
Online Access:View this record in EBSCOhost
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      jtl: International Journal of Audiology
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      dt: Mar2025
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      pub: Taylor & Francis Ltd
      place: Philadelphia, Pennsylvania
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        10.1080/14992027.2024.2335511
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        atl: Objective verification of audibility in bone conduction devices.
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        au:
          Persson, Ann-Charlotte
          Håkansson, Bo
          Fredén Jansson, Karl-Johan
          Reinfeldt, Sabine
          Eeg-Olofsson, Måns
        affil: Department of Otolaryngology, Head and Neck Surgery, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
      sug:
        subj:
          Bone Conduction Physiology
          Auditory Threshold Evaluation
          Hearing Aid Fitting
          Face Anatomy and Histology
          Transducers
          Speech Perception
          Human
          Hearing Aids
          Male
          Female
          Adult
          Middle Age
          Aged
          Aged, 80 and Over
          Funding Source
          Adult: 19-44 years
          Middle Aged: 45-64 years
          Aged: 65+ years
          Aged, 80 & over
          Male
          Female
      ab: Objective: To objectively measure audibility in patients wearing bone conduction devices (BCDs) with a new approach using a skin microphone at the patient's forehead. Design: The skin microphone was attached by a softband and shielded by an earmuff. This set-up was confirmed not to be influenced by neither noise floor nor sound bypassing the BCD. Sound field warble tones were used for measuring aided hearing thresholds and maximum power output (MPO) whereas an international speech test signal (ISTS) was presented at different speech levels. Study sample: 29 patients were tested (two were bilateral), 19 used percutaneous, eight used active transcutaneous and two used passive transcutaneous devices. Results: The skin microphone responses at ISTS levels, hearing threshold and MPO, could be obtained in all patients. Two patients with poor audibility are highlighted in this article as examples. After adjusting the gain of the BCD, they were retested with the skin microphone (for verification) and with speech-in-noise tests (for validation). Both tests confirmed an improved audibility after the adjustments. Conclusion: In summary, the proposed measurement of audibility of speech using a skin microphone is a promising method that can be used in a clinical setting for all types of BCDs.
      pubtype: Academic Journal
      doctype:
        pictorial
        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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