No, the air pressure in the diving bell is equal to the pressure of the water, so to you it will feel like it’s just regular water.
However, at their high air pressures they can’t actually fill the bell with air, as that would kill you (nitrogen becomes toxic), so they’d fill it with helium and oxygen…and then you [sound like a chipmunk](https://youtu.be/ACXlVEomWZY?t=94).
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