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Evoked-potential audiogram of an Indo-Pacific humpback dolphin (Sousa chinensis)
Li, Songhai1,2; Wang, Ding2; Wang, Kexiong2; Taylor, Elizabeth A.1; Cros, Emilie1; Shi, Wenjing2; Wang, Zhitao2; Fang, Liang2; Chen, Yuefei3; Kong, Fanming3
2012-09-01
Source PublicationJOURNAL OF EXPERIMENTAL BIOLOGY
ISSN0022-0949
Volume215Issue:17Pages:3055-3063
AbstractAn evoked-potential audiogram was measured for an Indo-Pacific humpback dolphin (Sousa chinensis) living in the dolphinarium of Nanning Zoo, China. Rhythmic 20 ms pip trains composed of cosine-enveloped 0.25 ms tone pips at a pip rate of 1 kHz were presented as sound stimuli. The dolphin was trained to remain still at the water surface and to wear soft latex suction-cup EEG electrodes used to measure the animal's envelope-following evoked potentials to the sound stimuli. Responses to 1000 rhythmic 20 ms pip trains for each amplitude/frequency combination were averaged and analysed using a fast Fourier transform to obtain an evoked auditory response. The hearing threshold was defined as the zero crossing point of the response input-output function using linear regression. Fourteen frequencies ranging from 5.6 to 152 kHz were studied. The results showed that most of the thresholds were lower than 90 dB re. 1 mu Pa (r.m.s.), covering a frequency range from 11.2 to 128 kHz, and the lowest threshold of 47 dB was measured at 45 kHz. The audiogram, which is a function of hearing threshold versus stimulus carrier frequency, presented a U-shape with a region of high hearing sensitivity (within 20 dB of the lowest threshold) between approximately 20 and 120 kHz. At frequencies lower than this high-sensitivity region, thresholds increased at a rate of approximately 11 dB octave(-1) up to 93 dB at 5.6 kHz. The thresholds at high frequencies above 108 kHz increased steeply at a rate of 130 dB octave(-1) up to 127 dB at 152 kHz.; An evoked-potential audiogram was measured for an Indo-Pacific humpback dolphin (Sousa chinensis) living in the dolphinarium of Nanning Zoo, China. Rhythmic 20 ms pip trains composed of cosine-enveloped 0.25 ms tone pips at a pip rate of 1 kHz were presented as sound stimuli. The dolphin was trained to remain still at the water surface and to wear soft latex suction-cup EEG electrodes used to measure the animal's envelope-following evoked potentials to the sound stimuli. Responses to 1000 rhythmic 20 ms pip trains for each amplitude/frequency combination were averaged and analysed using a fast Fourier transform to obtain an evoked auditory response. The hearing threshold was defined as the zero crossing point of the response input-output function using linear regression. Fourteen frequencies ranging from 5.6 to 152 kHz were studied. The results showed that most of the thresholds were lower than 90 dB re. 1 mu Pa (r.m.s.), covering a frequency range from 11.2 to 128 kHz, and the lowest threshold of 47 dB was measured at 45 kHz. The audiogram, which is a function of hearing threshold versus stimulus carrier frequency, presented a U-shape with a region of high hearing sensitivity (within 20 dB of the lowest threshold) between approximately 20 and 120 kHz. At frequencies lower than this high-sensitivity region, thresholds increased at a rate of approximately 11 dB octave(-1) up to 93 dB at 5.6 kHz. The thresholds at high frequencies above 108 kHz increased steeply at a rate of 130 dB octave(-1) up to 127 dB at 152 kHz.
SubtypeArticle
KeywordAep Response Hearing Sensitivity Marine Mammal Odontocete Cetacean Stimulus Sound
Department[Li, Songhai; Taylor, Elizabeth A.; Cros, Emilie] Natl Univ Singapore, Trop Marine Sci Inst, Marine Mammal Res Lab, Singapore 119227, Singapore; [Li, Songhai; Wang, Ding; Wang, Kexiong; Shi, Wenjing; Wang, Zhitao; Fang, Liang] Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Chen, Yuefei; Kong, Fanming] Dolphinarium Nanning Zoo, Nanning 530003, Guangxi, Peoples R China
DOI10.1242/jeb.070904
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationNational Natural Science Foundation of China [31070347]; Ministry of Science and Technology of China [2011BAG07B05-3]; State Oceanic Administration of China [201105011]; Marine Mammal Research Laboratory, Tropical Marine Science Institute, National University of Singapore ; National Natural Science Foundation of China [31070347]; Ministry of Science and Technology of China [2011BAG07B05-3]; State Oceanic Administration of China [201105011]; Marine Mammal Research Laboratory, Tropical Marine Science Institute, National University of Singapore ; National Natural Science Foundation of China [31070347]; Ministry of Science and Technology of China [2011BAG07B05-3]; State Oceanic Administration of China [201105011]; Marine Mammal Research Laboratory, Tropical Marine Science Institute, National University of Singapore ; National Natural Science Foundation of China [31070347]; Ministry of Science and Technology of China [2011BAG07B05-3]; State Oceanic Administration of China [201105011]; Marine Mammal Research Laboratory, Tropical Marine Science Institute, National University of Singapore
Indexed BySCI
Language英语
WOS Research AreaLife Sciences & Biomedicine - Other Topics
WOS SubjectBiology
WOS IDWOS:000307638700023
WOS KeywordWHALE PSEUDORCA-CRASSIDENS ; TURSIOPS-TRUNCATUS ; AUDITORY-THRESHOLDS ; PHOCOENA-PHOCOENA ; UNDERWATER AUDIOGRAM ; ECHOLOCATION SIGNALS ; HEARING MEASUREMENTS ; PORPOISE ; AUDIOMETRY ; CETACEANS
Funding OrganizationNational Natural Science Foundation of China [31070347]; Ministry of Science and Technology of China [2011BAG07B05-3]; State Oceanic Administration of China [201105011]; Marine Mammal Research Laboratory, Tropical Marine Science Institute, National University of Singapore ; National Natural Science Foundation of China [31070347]; Ministry of Science and Technology of China [2011BAG07B05-3]; State Oceanic Administration of China [201105011]; Marine Mammal Research Laboratory, Tropical Marine Science Institute, National University of Singapore ; National Natural Science Foundation of China [31070347]; Ministry of Science and Technology of China [2011BAG07B05-3]; State Oceanic Administration of China [201105011]; Marine Mammal Research Laboratory, Tropical Marine Science Institute, National University of Singapore ; National Natural Science Foundation of China [31070347]; Ministry of Science and Technology of China [2011BAG07B05-3]; State Oceanic Administration of China [201105011]; Marine Mammal Research Laboratory, Tropical Marine Science Institute, National University of Singapore
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/17164
Collection水生生物多样性与资源保护研究中心_期刊论文
Corresponding AuthorLi, Songhai; Wang, Ding; Wang, Kexiong; Taylor, Elizabeth A.; Cros, Emilie; Shi, Wenjing; Wang, Zhitao; Fang, Liang; Chen, Yuefei; Kong, Fanming
Affiliation1.Natl Univ Singapore, Trop Marine Sci Inst, Marine Mammal Res Lab, Singapore 119227, Singapore
2.Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Inst Hydrobiol, Wuhan 430072, Peoples R China
3.Dolphinarium Nanning Zoo, Nanning 530003, Guangxi, Peoples R China
Recommended Citation
GB/T 7714
Li, Songhai,Wang, Ding,Wang, Kexiong,et al. Evoked-potential audiogram of an Indo-Pacific humpback dolphin (Sousa chinensis)[J]. JOURNAL OF EXPERIMENTAL BIOLOGY,2012,215(17):3055-3063.
APA Li, Songhai.,Wang, Ding.,Wang, Kexiong.,Taylor, Elizabeth A..,Cros, Emilie.,...&Kong, Fanming.(2012).Evoked-potential audiogram of an Indo-Pacific humpback dolphin (Sousa chinensis).JOURNAL OF EXPERIMENTAL BIOLOGY,215(17),3055-3063.
MLA Li, Songhai,et al."Evoked-potential audiogram of an Indo-Pacific humpback dolphin (Sousa chinensis)".JOURNAL OF EXPERIMENTAL BIOLOGY 215.17(2012):3055-3063.
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