NDLI: Effect of Angle on Flow-Induced Vibrations of Pinniped Vibrissae

Content Provider	PubMed Central
Author	Murphy, Christin T. Eberhardt, William C. Calhoun, Benton H. Mann, Kenneth A. Mann, David A.
Editor	Maravall, Miguel
Copyright Year	2013
Abstract	Two types of vibrissal surface structures, undulated and smooth, exist among pinnipeds. Most Phocidae have vibrissae with undulated surfaces, while Otariidae, Odobenidae, and a few phocid species possess vibrissae with smooth surfaces. Variations in cross-sectional profile and orientation of the vibrissae also exist between pinniped species. These factors may influence the way that the vibrissae behave when exposed to water flow. This study investigated the effect that vibrissal surface structure and orientation have on flow-induced vibrations of pinniped vibrissae. Laser vibrometry was used to record vibrations along the whisker shaft from the undulated vibrissae of harbor seals (Phoca vitulina) and northern elephant seals (Mirounga angustirostris) and the smooth vibrissae of California sea lions (Zalophus californianus). Vibrations along the whisker shaft were measured in a flume tank, at three orientations (0°, 45°, 90°) to the water flow. The results show that vibration frequency and velocity ranges were similar for both undulated and smooth vibrissae. Angle of orientation, rather than surface structure, had the greatest effect on flow-induced vibrations. Vibration velocity was up to 60 times higher when the wide, flat aspect of the whisker faced into the flow (90°), compared to when the thin edge faced into the flow (0°). Vibration frequency was also dependent on angle of orientation. Peak frequencies were measured up to 270 Hz and were highest at the 0° orientation for all whiskers. Furthermore, CT scanning was used to quantify the three-dimensional structure of pinniped vibrissae that may influence flow interactions. The CT data provide evidence that all vibrissae are flattened in cross-section to some extent and that differences exist in the orientation of this profile with respect to the major curvature of the hair shaft. These data support the hypothesis that a compressed cross-sectional profile may play a key role in reducing self-noise of the vibrissae.
Related Links	http://dx.doi.org/10.1371/journal.pone.0069872
Starting Page	69872
File Format	PDF
ISSN	19326203
e-ISSN	19326203
Journal	PLoS ONE
Issue Number	7
Volume Number	8
Language	English
Publisher	Public Library of Science
Publisher Date	2013-07-01
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Agricultural and Biological Sciences(all) Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Comparative Analysis of the Flexural Stiffness of Pinniped Vibrissae

The Effect of Laser Trabeculoplasty on Posture-Induced Intraocular Pressure Changes in Patients with Open Angle Glaucoma

Fused Traditional and Geometric Morphometrics Demonstrate Pinniped Whisker Diversity

Predictions of Experimentally Observed Stochastic Ground Vibrations Induced by Blasting

Flow sensing by pinniped whiskers

On the Challenge of Interpreting Census Data: Insights from a Study of an Endangered Pinniped

Effect of Wrist Angle on Median Nerve Appearance at the Proximal Carpal Tunnel

Effect of Influenza-Induced Fever on Human Bioimpedance Values

The Effect of Disease-Induced Mortality on Structural Network Properties

Effect of Angle on Flow-Induced Vibrations of Pinniped Vibrissae

Similar Documents

Comparative Analysis of the Flexural Stiffness of Pinniped Vibrissae

The Effect of Laser Trabeculoplasty on Posture-Induced Intraocular Pressure Changes in Patients with Open Angle Glaucoma

Fused Traditional and Geometric Morphometrics Demonstrate Pinniped Whisker Diversity

Predictions of Experimentally Observed Stochastic Ground Vibrations Induced by Blasting

Flow sensing by pinniped whiskers

On the Challenge of Interpreting Census Data: Insights from a Study of an Endangered Pinniped

Effect of Wrist Angle on Median Nerve Appearance at the Proximal Carpal Tunnel

Effect of Influenza-Induced Fever on Human Bioimpedance Values

The Effect of Disease-Induced Mortality on Structural Network Properties

Effect of Angle on Flow-Induced Vibrations of Pinniped Vibrissae