Chiang Mai Journal of Science, Faculty of Science, Chiang Mai University

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Paper Type	Contributed Paper
Title	Restricted-range Frequency Scanning of Airborne Reflected Ultrasonic Pulse Amplitudes
Author	Sittisak Siriwitayakorn
Email	-
Abstract: Effects of various orientations of a reflector on the airborne reflected ultrasonic pulse amplitudes were investigated while keeping both the transeiver set and the target stationary. Frequency scanning of ultrasonic waves was performed in the restricted range of 42.1 to 48.7 KHz. The results revealed that interesting characteristic information of the reflector’s orientation could be gathered using this frequency scanning technique. It is possible that dolphins can utilize this technique to recognise orientations of their hidden-in-sand preys and hence know exactly which way to bite.
Start & End Page	23 - 28
Received Date	2006-02-24
Revised Date
Accepted Date	2006-05-02
Full Text	Download
Keyword	frequency scanning, airborne, ultrasonic pulse, restricted range
Volume	Vol.34 No.1 (JANUARY 2007)
DOI
Citation	Siriwitayakorn S., Restricted-range Frequency Scanning of Airborne Reflected Ultrasonic Pulse Amplitudes, Chiang Mai Journal of Science, 2007; 34(1): 23-28.
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View:619 Download:173

Simple Symmetry and Boundary Verification via Airborne Reflected Fundamental and Second Harmonic Ultrasonic Pulse Amplitudes
page: 59 - 68
Author:Kingkeo Siriwitayakorn
Vol.30 No.2 (AUGUST 2003) View: 630 Download:190

Time Scanning of Airborne Reflected Fundamental and Second Harmonic Ultrasonic Pulse Amplitudes
page: 19 - 25
Author:Sittisak Siriwitayakorn* and Kingkeo Siriwitayakorn
Vol.30 No.1 (APRIL 2003) View: 614 Download:147

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