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- Title
Effects of auricular hematoma on detection threshold of cartilage conduction.
- Authors
Akane Tamura; Sho Otsuka; Seiji Nakagawa
- Abstract
In cartilage conduction (CC), a vibrator is presented onto the auricle cartilage instead of the skull used in ordinary bone conduction (BC). Because the auricle cartilage is softer and lighter than the bone, it doesn't require as much pressure as BC, which may cause discomfort and pain to hold a transducer. However, influence of the properties of the auricle itself on CC is still unclear. In this paper, we measured the auricle hardness, size and CC thresholds for participants with auricular hematoma or "cauliflower ear" and compared the results with those of normal earshape participants. We also investigated relationships between auricle characteristics and CC threshold. The hematoma participants showed significant increases of the hardness in some parts of the auricle, higher hearing thresholds in the low-frequency range and lower thresholds in the high-frequency range compared to the normal-ear participants. We also found that auricular characteristics, specifically the hardness and size, affect the hearing thresholds of CC. These findings suggest that changes in the auricle hardness and mass, as a result of hematomas, may alter the transmission of CC sound.
- Publication
Transactions of Japanese Society for Medical & Biological Engineering, 2023, Vol 61, p406
- ISSN
1347-443X
- Publication type
Article