*You can only teleport out to where you teleported in from.

Does this mean you get dropped into outer space if you stay inside for more than checks notes ~4 minutes?

Is it feasible? Sure. The limit on this kind of calculation is basically how much detail do we need to add to the environment (i.e., can we make the model) and how high resolution does the sound wave need to be (can we calculate it given finite compute resources).

To get something that roughly sounds like a rock? Not difficult to model or calculate, if we make some reasonable assumptions.

The sound of a wet towel thrown in the water during a hailstorm? Uhhh that’s a tough one.

Simulating sound uses classical mechanics governed by the wave equation, which is well-understood. In terms of CPU power, the calculation to propagate a simple sound wave (wavelet) could probably have been done on a TI-89 calculator from high school.

The idea is checking out with more than a basket of goods is really inconvenient. And I agree, it’s much slower and there’s no space for it.

It all depends on what you mean by affect. Two em waves in the same space will have a different overall amplitude at any frequency.

If you mean as in the overall color of light, that will change based on how much/what frequency waves are combined. Think about adding a bit of black sand to a jar of white sand – from a distance it will appear grey but the actual colors of individual grains of sand (frequency of “individual” em waves) won’t change.

For wifi, data transmission is via phase modulation of the em wave, so the signal is resilient against adding different frequencies/amplitudes but may suffer if the same frequency is transmitted at a different phase.

If you’re not afraid of the legal system why not slap a Disney logo on there too?

Why do you think the organic label for food means nothing?

https://www.usda.gov/media/blog/2012/03/22/organic-101-what-usda-organic-label-means