I would bet this little dog is completely and literally amazed, I noticed he doesn’t fact no hey swimming watch him Paddle away. I just move my jaw to equalize in a helmet. I hardly ever use valsalva unless I’m having clearing problems. Those that don’t think clearing is necessary just clearly have never dove in a helmet. I just remember about free willy diving.
Actually that doesn’t make sense. This only works because the are very shallow. At any depth the bowl would need to be pressurised to ambient pressure or the dog wouldnt be able to breathe, the external pressure on its lungs would be too great. If the bowl is pressurised the dog would need to equalise its ears. Also that is one big dead air space. CO2 buildup will be a problem in deep sea diving experience. If you look at the bubbles you can see lots of short bursts, indicating rapid shallow breathing typical of hypercapnia.
Actually alot of short bursts is how a small dog breathes. Normal respiratory rate for adult humans is 12 to 20 bpm. A diver would be on the slower and deeper end of that spectrum. For dogs 15 to 35 bpm, on average higher, especially for a small breed. I don’t really know how they are keying the regulator for that bubble of why its double hosed at all.
Hmmm i m not an expert but in my opinion the physics is quite the same than the mask… In order to avoid mask squeez diver just has to blow by noze… So in case of this puppy as soon as the valve is set up to the good pressure no issue with his ears. Regarding the respiratory i agree with jack… Breath rhythm of small dog is much more fast than human. The pressure effect on the dog is the same as a diver. (It’s basically helmet diving). The dog should equalise but probably doesn’t since it’s only shallow.
Ya doesn’t work like that he would still need to clear even in a closed space. Just like a dive hat you would still need to clear even you have regulated air supplying air to the hat the pressures will change…unless its like a one atmosphere suit. The mouth and ear of the dog are within the same space. That means the inside and outside of the ear drum are of the same pressure.
Ok so when you get in a compression chamber your whole body is in the same space you still have to equalize to compensate for the pressure..when you fly in an airplace you mouth and ears are in the same space… Equalising is sort of an automatic reaction within small changes. People yawn or click their jaw, babies scream on aircraft. Divers have strategies as the difference is great. Dog was shallow, adapted.
I don’t think they would’ve posted this video and advertised the dog being sick or being potentially in danger….
The air inside the helmet is still the same pressure as the depth or else the dog would get sucked into the helmet. Cmon now think logically… the dog still needs to equalize. Unless the dogs inner ear allows for easy air passage.
The commercial dive helmet is pressurized. It increases and decreases to compensate for depth, same as the regulator has to -+psi in order to inflate lungs. Deeper you go, higher psi to inflate lungs. This means higher psi for inside of helmet area where ears are.
Credit: tv program on Animal Planet. Mac & Mutley