title: Tissue physical property of the harbor porpoise Phocoena phocoena for investigation of the sound emission process.
abstract: The process by which sound is propagated in the head of a toothed whale is still a subject of discussion. Investigating the distribution of acoustic impedance calculated by density and Young's modulus is effective for quantitative comprehension because acoustic impedance determines the reflection coefficient of a sound wave. However, the sound propagation process of the toothed whale has been mainly examined by either anatomical techniques or the measurement of density or sound velocity. In the current study, the acoustic impedance of head tissue of harbor porpoise was measured. Results of this study should be a helpful information for further discussion about the relationship between the structure of sound-producing organ and clicks property.
authors.affiliation: Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1, Minato-cho Hakodate, Hokkaido 041-8611, Japan.
authors.forename: Mika
authors.initials: M
authors.lastname: Kuroda
authors.affiliation: Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Nishi 2-11, Inada-cho, Obihiro, Hokkaido 080-8555, Japan.
authors.forename: Motoki
authors.initials: M
authors.lastname: Sasaki
authors.affiliation: Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Nishi 2-11, Inada-cho, Obihiro, Hokkaido 080-8555, Japan.
authors.forename: Kazutaka
authors.initials: K
authors.lastname: Yamada
authors.affiliation: School of Systems Information Science, Future University Hakodate, 116-2, Kamedanakano-cho Hakodate, Hokkaido 041-8655, Japan.
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Miki
authors.affiliation: Faculty of Fisheries Sciences, Hokkaido University, 3-1-1, Minato-cho Hakodate, Hokkaido 041-8611, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Matsuishi
mesh_terms: D000818:Animals; D001299:Audiometry; D001921:Brain / Q000033:anatomy & histology* / Q000502:physiology; D005260:Female; D050741:Phocoena / Q000502:physiology*; D011571:Psychoacoustics; D013312:Stress, Physiological / Q000502:physiology; D014057:Tomography, X-Ray Computed; D014828:Vocalization, Animal / Q000502:physiology*