SO: v8 (First Timers)

WILD COCHLEAS:  Bats can be in a cave with a million other bats and not get overwhelmed with the sonar of other bats screaming at them from every direction.

WILD COCHLEAS:  Kids can hear sounds that vibrate 20,000 times a second. Older folks have trouble with high sounds over 16,000 hz.

D COCHLEAS:  Whales cannot detect sounds too low for us to hear. They can hear only sounds that we hear.

WILD COCHLEAS:  The wide front of the inside of the snail-shaped cochlea has stiff hairs. These detect low sounds like the booming of a bass drum.

WILD COCHLEAS:  Animals, such as elephants and whales hear infrasound—sound higher than we can hear.

WILD COCHLEAS:  Dolphins and bats can hear sounds higher than we can hear.

WILD COCHLEAS:  Bats, like the horseshoe bat, can tell sounds apart that are 1/10 of vibration less than another’s when vibrating 180,000 times a second.

WHALE SOUNDS:   Whales are masters of LOUD sounds. They can hit 280 decibels! Jet engines reach just 140 decibels.

WHALE SOUNDS:   Whales in the waters off New York can communicate with whales all the way across the Atlantic Ocean off the shores of California.

WHALE SOUNDS:   In WW2 we learned that there was a section of the ocean at 3000 feet that’s now named the SOFAR channel. Fin Whales like to go there.