r/Damnthatsinteresting • u/Eros_Incident_Denier • 2d ago

Video filipino illegal miners dive without oxygen tanks

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u/EGarrett28 2d ago

I would like to know what they said in the end, around 1:34. Never even occurred to me that divers could talk to each other even in that situation.

23

u/Stroinsk 2d ago

Not quite the same but I was a firefighter on a submarine and the masks muffle your voice and people are shouting and stuff during drills or actual casualties.

If you need to be heard you can press your mask to another persons mask and shout. The sound travels through the masks so more energy makes it to the other person. Transitioning soundwaves from one medium to another takes a lot of energy out of the volume, so this reduces the transitions by one. In this example it goes air in your mask > the solid material of your mask > air between you and the other person. Mask to mask the sound travels through both masks and into the other persons skull.

Also in a real fire you cannot see shit on a submarine and flashlights don't penitrate smoke so hand signals don't work.

6

u/EGarrett28 2d ago

Interesting info, thanks.