[teeray]

You could probably do it acoustically to some degree. A punch is going to violently displace some air proportionately to its impact.

Also, It might be undetectably negligible, but it would be an interesting experiment to see if a sufficiently sensitive thermal camera would be able to gather information on how much the air is getting compressed in advance of a punch.

[jfhdnfbrh]

Respectfully, I think the noise of the crowd + the fighters might make that a non starter :(

[Retric]

You bring up a good point, it definitely a difficult environment. However there’s a lot of techniques for isolating sounds in a noisy environment.

Getting clean audio from performers at concerts is only moderately challenging these days, with plenty of great examples to point to. So I wouldn’t be so quick to dismiss the idea.