In the past few days, I discussed with 3man about the sound in the deep sea, checked some information, tried it myself, and found that there was indeed a bug here.

People can hear sound in the water, and if a sound is made in the water, it will sound clearer in the same body of water than on land, because the loss of sound waves in the water is lower than in the air. And because of the air pressure, the water will not directly contact the eardrum, and the air in the ear will form a small air sac between the water and the eardrum to separate the water from the eardrum, so there will be no phenomenon that I imagined that the water compresses the eardrum and causes it to not vibrate. I really shouldn't have been in class in anatomy and physiology to fight with my classmates with my leg bones, and now I have been punished. But this is not easy to change, so let me use the slight difference in the structure of the human body in the other world as an excuse.

But you can't talk in the water, as long as you don't want to choke to death.

Therefore, in order to avoid misleading some readers and friends, I specially explain here, I hope you don't complain that my knowledge of physics and anatomy is not up to par, and I will try to ask professionals for this kind of professional problems in the future, and then write, please forgive me.

Finally, I would like to thank 3man again for correcting my mistakes, and I hope that other readers and friends who read this text will give me advice.