Science Buddies: "Ask an Expert"

Hi,

I want to do my science fair project on echolocation. I am specifically interested in finding out if sound travels better in salt or fresh water, clean or dirty water and warm or cold water. Do you know how I would make sound that would travel in water and how I would measure that sound?

Thanks for your help.

Olivia Schneiter Nerdin

Hi,



Here is a great article on how you can use echolocation:

http://www.newscientist.com/article/mg2 ... ?full=true

Check out this website, particularly the videso clips:

http://www.worldaccessfortheblind.org/

Here is a report yhat says the average person can learn to echolocate in about a month, practicing 1 to 2 hours a day:

http://news.nationalgeographic.com/news ... ation.html

This page describes an echolocation activity:

http://www.pbs.org/saf/1308/teaching/teaching.htm

Sorry if this post does not directly respond to h ow to do echolocation in water. My personal reaction is that it would be far more fun to learn to do echolocation yourself. If you are intent on doing an echolocation project of sound in water, here is a page on do it yourself sonar:

http://www.juliantrubin.com/encyclopedi ... sonar.html



http://en.allexperts.com/q/Science-Kids ... -model.htm

http://www.stevetarzia.com/papers/NWU-EECS-09-06.pdf

I hope this helps. It looks you can do a really cool project on this topic! Have fun.

Best regards,

Barrett L. Tomlinson