Whales and other sea creatures
not very
by this hydrophone we can easily record the voice of the people in our group that who are transfering our locations,targets,ideas to the enemies.......
It just does what it do's
The hydrophone :)
hydrophone
Hydrophone
Sonar SOund Navigation And Ranging
188 decibles
Marine biologists use hydrophones to record underwater sounds.
I have heard of billy goat
howler monkey
If there is ,I've never heard of it !