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Underwater speakers keep invasive fish out of north stretch of Mississippi River

NBC/KTTC
All About Animals
Tuesday, August 5, 2014 - 6:05pm

(KTTC) An invasive species of carp have been slowly making their way up north on the Mississippi River, threatening the natural species that call those waters home.

Now, a scientist at the University of Minnesota is trying a unique experiment to stop the invasive carp from disturbing our state's ecosystem by installing a speaker system underwater.

Dr. Peter Sorensen is the scientist behind this acoustic deterrent system; essentially, just annoying speakers that scare off fish that don't belong.

"It broadcasts sounds between 500 and 2,000 Hz which is within the hearing range of these fish, but outside the hearing range of native fish," explains Dr. Sorensen. "When we play them in the lab, these sounds, they jump and swim away."

Read more: http://bit.ly/1v6LgS7

New underwater audio system is designed to keep invasive carp away from a stretch of the Mississippi River

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