3 ms·

BTW, for anyone that has never dived to any depth, you don't really feel the change in pressure much at 20m or 30m, even though you are at 3 to 4 times atmosphe

BTW, for anyone that has never dived to any depth, you don't really feel the change in pressure much at 20m or 30m, even though you are at 3 to 4 times atmospheric pressure. Apart from your ear canals, which can very painful if you don't manage to equalize them. The air from the scuba tank is fed at ambient pressure, so your chest isn't compressed and you don't really feel it on the rest of your body.

patrakov 2y ago
(Former freediver here) Down to ~27 meters, there is also nothing special when freediving, assuming that you took the fullest possible breath before diving. This is because the water pressure compresses your chest, but it is within the normal excursion limits, i.e., it would compress to the same degree if you fully exhale on dry land, so it feels like something that commonly happens. Below that, it feels like something tries to squeeze you softly. You can try to emulate this feeling on dry land by forcefully exhaling everything that you can plus a bit more with arms down, closing the glottis, and then lifting your arms up.