Investigation on acoustic reception pathways in finless porpoise (Neophocaena asiaorientalis sunameri) with insight into an alternative pathway

Investigation on acoustic reception pathways in finless porpoise (Neophocaena asiaorientalis sunameri) with insight into an alternative pathway
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研究江豚(Neophocaena asiaorientalis sunameri)的声学接收路径,并深入了解替代路径

DOI:
10.1088/1748-3190/aaeb01
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发表时间:
2018-11
影响因子:
3.4
通讯作者:
Xiaohui Xu
Xiaohui Xu
中科院分区:
计算机科学3区
文献类型:
--
作者:
Zhongchang Song;Yu Zhang;T Aran Mooney;Xianyan Wang;Adam B Smith;Xiaohui Xu

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声音的传输和接收是齿鲸回声定位和日常生活的重要组成部分。在这里,我们结合联合收割机的计算机断层扫描(CT)扫描和有限元建模研究的声学传播的江豚(Neophocaena asiaorientalis sunameri)回声定位脉冲。CT扫描和有限元法波传播模型的结果支持公认的颌听觉通路假说,并建议一个额外的替代听觉通路组成的结构,下颌骨(下颌)和内部下颌脂肪,具有不同的声阻抗,这也可以进行声音的耳朵复合体。下颌骨内脂肪附着在耳复合体上,并在侧面和前面被下颌骨包裹。模拟结果表明,在这条途径中的信号最初传播沿着固体下颌骨,并被传输到内部下颌脂肪的声学耦合软组织进行刺激后,因为它最终到达耳复合体。在支持传统理论的同时,这种新的骨组织传导通路可能对理解各种牙鲸类物种的听觉和声音接收过程有意义。
Sound transmission and reception are both vital components to odontocete echolocation and daily life. Here, we combine computed tomography (CT) scanning and finite element modeling to investigate the acoustic propagation of finless porpoise (Neophocaena asiaorientalis sunameri) echolocation pulses. The CT scanning and finite element method wave propagation model results support the well-accepted jaw-hearing pathway hypothesis and suggest an additional alternative auditory pathway composed of structures, mandible (lower jaw) and internal mandibular fat, with different acoustic impedances, which may also conduct sounds to the ear complexes. The internal mandibular fat is attached to the ear complex and encased by the mandibles laterally and anteriorly. The simulations show signals in this pathway initially propagate along the solid mandibles and are transmitted to the acoustically coupled soft tissue of the internal mandibular fat which conducts the stimuli posteriorly as it eventually arrives at ear complexes. While supporting traditional theories, this new bone-tissue conduction pathway might be meaningful to understand the hearing and sound reception processes in a wide variety of odontocetes species.
鳍鲸声接收机制:颅骨振动可实现低频听力。
DOI: 10.1371/journal.pone.0116222
发表时间: 2015
期刊: PloS one
影响因子: 3.7
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DOI: 10.1016/s0074-7742(08)60637-6
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影响因子: 2.4
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AROYAN, JL;CRANFORD, TW;NORRIS, KS
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