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This article and any supplementary material should be cited as follows: Morimoto C, Nishimura T, Hosoi H, Saito O, Fukuda F, Shimokura R, Yamanaka T. Sound.

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Presentation on theme: "This article and any supplementary material should be cited as follows: Morimoto C, Nishimura T, Hosoi H, Saito O, Fukuda F, Shimokura R, Yamanaka T. Sound."— Presentation transcript:

1 This article and any supplementary material should be cited as follows: Morimoto C, Nishimura T, Hosoi H, Saito O, Fukuda F, Shimokura R, Yamanaka T. Sound transmission by cartilage conduction in ear with fibrotic aural atresia. J Rehabil Res Dev. 2014;51(2):325–32. http://dx.doi.org/10.1682/JRRD.2013.05.0128 Slideshow Project DOI:10.1682/JRRD.2013.05.0128JSP Sound transmission by cartilage conduction in ear with fibrotic aural atresia Chihiro Morimoto, MD; Tadashi Nishimura, MD, PhD; Hiroshi Hosoi, MD, PhD; Osamu Saito; Fumi Fukuda; Ryota Shimokura, PhD; Toshiaki Yamanaka, MD, PhD

2 This article and any supplementary material should be cited as follows: Morimoto C, Nishimura T, Hosoi H, Saito O, Fukuda F, Shimokura R, Yamanaka T. Sound transmission by cartilage conduction in ear with fibrotic aural atresia. J Rehabil Res Dev. 2014;51(2):325–32. http://dx.doi.org/10.1682/JRRD.2013.05.0128 Slideshow Project DOI:10.1682/JRRD.2013.05.0128JSP Aim – Test proposed hearing aid using cartilage conduction (CC) as alternative to bone conduction (BC). Relevance – Transducer developed for this application: Lightweight. Requires much smaller fixation force than BC. More convenient to use. – CC can benefit patients with fibrotic aural atresia. Fibrotic tissue connected to ossicles provides additional pathway for sound to reach cochlea via CC.

3 This article and any supplementary material should be cited as follows: Morimoto C, Nishimura T, Hosoi H, Saito O, Fukuda F, Shimokura R, Yamanaka T. Sound transmission by cartilage conduction in ear with fibrotic aural atresia. J Rehabil Res Dev. 2014;51(2):325–32. http://dx.doi.org/10.1682/JRRD.2013.05.0128 Slideshow Project DOI:10.1682/JRRD.2013.05.0128JSP Method Measured BC and CC thresholds in 6 ears with fibrotic aural atresia. Investigated relationship between CC thresholds and results of computed tomography.

4 This article and any supplementary material should be cited as follows: Morimoto C, Nishimura T, Hosoi H, Saito O, Fukuda F, Shimokura R, Yamanaka T. Sound transmission by cartilage conduction in ear with fibrotic aural atresia. J Rehabil Res Dev. 2014;51(2):325–32. http://dx.doi.org/10.1682/JRRD.2013.05.0128 Slideshow Project DOI:10.1682/JRRD.2013.05.0128JSP Results In ears with fibrotic tissue pathway: – CC thresholds were lower than BC thresholds at 0.5 and 1.0 kHz. At 2.0 kHz: – No significant difference between BC and CC thresholds.

5 This article and any supplementary material should be cited as follows: Morimoto C, Nishimura T, Hosoi H, Saito O, Fukuda F, Shimokura R, Yamanaka T. Sound transmission by cartilage conduction in ear with fibrotic aural atresia. J Rehabil Res Dev. 2014;51(2):325–32. http://dx.doi.org/10.1682/JRRD.2013.05.0128 Slideshow Project DOI:10.1682/JRRD.2013.05.0128JSP Conclusion Findings suggest that sound in low to middle frequency range is transmitted more efficiently by CC via fibrotic tissue pathway than BC. Hearing devices using CC can aid rehabilitation, particularly in patients with fibrotic aural atresia.

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