What tool do scientists use to determine the effects of SONAR on whales?

Question

My marine biology class watched a national geographic video on whaling. It was shown that SONAR could kill whales, causing tumors in the brain and other things of that nature. I missed the second day of watching the video where it said the methods used to determine the effects. I know they performed autopsies, however I do not know what tool they used. Anyone know?

Answer 1

Necropsy (animal autopsy) is the only way to examine the auditory and nervous systems of a whale. Naturally, one must die and get washed ashore before that's possible. They use the same tools they use on other animals and humans, but the saws are larger.
In the last few months, we have had 3 dead whales wash up on the beaches here in Ventura and Santa Barbara counties. Two were killed by being run over by ships/boats traversing the Santa Barbara Channel, and one died from natural causes (they think). They included a juvenile blue whale, a small sperm whale, and a grey whale.

Answer 2

Whaleometer.