The moon scene makes no sense

Well, we all have been duped by NASA a long time ago, and now they're still supposedly trying to get 'back', but now they suddenly can't do it. Not weird at all?

In any case, I get that 'superpeople' can survive without 'astronot [sic] suits', maybe they don't need oxygen to breathe and all that (though I'd like to know how their internal organs, food-energy-conversions, blood circulation and such work - I guess Lois never was a very good reporter for omitting to ask these kinds of questions)..

..but how are they able to SPEAK without oxygen?

Usually in living beings, speech requires lungs, air, vocal cords and mouth to work in perfect sync and conjunction with the consciousness of the speaker (evident by the not-very-conscious entities trying to speak, like Mr. 'G.O. Brandon').

Now, disregarding everything else, how would ANYONE, superbeing or not, make a 'H'-sound in an oxygen-free environment, like the moon? We can talk about there being 'trace amounts' of oxygen there, or a very thin atmosphere instead of 'no atmosphere', but I still can't figure out how anyone can speak on the surface of the moon without some kind of solution, like a suit, that provides the oxygen required.

How do you say 'HHHHHH' in a vacuum, where there's no oxygen, air, or gases of any kind to propel through your mouth to form that particular sound?

These people weren't born superbeings, they weren't trained, they didn't live on the moon for 12 years to learn some special technique to generate air and then use that to form the 'H'-sound, they're fresh out of a 'phantom zone' prison, so what's the explanation?

It just doesn't make any sense for them to be able to effortlessly speak without air and form all kinds of 'airy sounds' and vocals as well.