Orca Vocalization and Localization

Environmental Science Program

Physics Department

page prepared on April 5, 2002

Welcome to the Page by Paul

I'm in my third year as a Physics and Mathematical Economics double major at Colorado College. I was born in Denver, but my folks live just outside of Boston in a town called Wayland where I call home. At school I'm involved in many things from being vice president and treasurer of Fiji, a fraternity on campus, to working part time at the computer help desk. Thanks to Val I was invited to come on this trip in the San Juan Islands and help to produce a close circuit automated camera system.

The project I'm working on is simply acquiring video footage of Orcas. Unfortunately this project is not so simple. To demonstrate the complexity of this project I will start with a whale swimming (and hopefully making noise) in the water to the west of San Juan Island. The noise the whale makes will be picked up by our hydrophones. The hydrophones will then send the signal to our research base, where computers will collect the data and calculate a position where the whale is. This is a very complicated process using some fancy Fourier analysis to calculate time delays. Once the time delays are calculated it is simple geometry to acquire a position. Another computer will use that position to send out four signals to a camera and tripod mount. Two signals will tell the tripod to align its self at a specific altitude and azimuth. The other two signals will tell the lens to zoom and focus. These signals go into a microprocessor called an OOPic. The OOPic is an object oriented programmable microprocessor that sends out signals. These signals then go through a circuit board Winn and I designed to convert the signal into proper voltages that will move the mount and lens. Once the camera is aligned properly the computer will begin recording the video footage. This footage will be stored on an external computer hard drive. Then researchers around the world can view this footage in an attempted to understand the mysterious behavior of the Killer Whale.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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