So random question.

I have these crappy little speakers that I plug in on my computer to get sound. For a while now, my router's wifi signal can be "heard" over the speakers. It's like a soft thwapp thwapp thwapp rhythmic faint helicopter blade noise.

I can "fix" it by adjusting one of the antenae on the router or moving the whole unit slightly but this gets annoying and I always seem to move it just enough that the noise comes back. Funny enough the noise is most prominent when the antena is on a parallel plane to the speaker (maybe some physics / electronical engineering geek and tell me why :) ).

Is there a quick easy setting fix for this? Some kind of shielding I can get that hopefully doesn't have to cover the entire wire of the speakers? Maybe adjust a frequency or something? I don't really want to move stuff around because of the way my area is set up.

So curious question:

Why do you want to keep using these crappy little speakers? Don't you care about the sound quality?

I'm assuming that your speakers' USB power line is connected to your PC. Maybe you should try to connect it to an external USB Power Adapter instead (you probably have an old one lying around). It might eliminate the static sound.

The OP didn't say that his speakers were USB. But yeah, it's often USB that picks up external signals (never had this issue myself).
But why buy cheap crappy USB speakers? The built-in DAC is probably worse than the one of the integrated sound chip... and it steals a USB port.

Did you try moving to a different USB port?
Did you try what can be done with a sheet or plate of metal or even tin foil?

Try to cover it with tin foil, maybe it could improve :P

You sure this isn't HAARP or MK Ultra at work here? :P. Just kidding. It sure sounds strange that your speakers are picking up Wifi signals that are not that energetic to be honest. We are talking about 2.4 or 5 GHz respectively. As for your question, the simple answer is that the signal is the strongest when their are no physical obstructions between the antenna and the reciever( in this case the speakers). A simple solution is to just put something in between your speakers and the wifi router, since wifi signals can pass through solid objects but get slighlty weaker. Might not be the solution but worth a try. If the cause is the wire then you should look into better isolating it. Maybe the connections got loose and some wire is sticking out. Keep us updated :). Cheers

Not only will this be a none-issue with better speakers, but (besides overall better sound) better ones will also last a very long time. You can get so much more out of a good game with a good set of speakers. Being an audiophile has nothing to do with it. I hope you're not one of those people that also only use really shitty built-in TV speakers.

While my aging Bose Companion 2 Series 2 speakers weren't a real bargain, they're excellent all-round PC speakers (movies, music, games), and they sound just as good as they did when I first got them 12+ years ago. They're the only same pieces of hardware that are still in use since then.

This. Assuming you have proper shielding on the wire and it's properly grounded, you shouldn't get any interference. Otherwise the wire will act like an antenna. Embedded devices with wifi cards will actually use wires + metal plate endings as antennas in most cases.

3.5mm audio jack.

What he said. Desktops seem way worse than laptops, probably due less shielding. It can be really a challenge to eliminate audible interference, the noise pickup can be anywhere really. In the jack plug (less likelly), on speaker cables or the circuit board itself (inside the speakers), even inside the computer.

I've deal with it before with self build speakers. Usb powered cheap speakers can be a big problem picking the interference and having loud hiss...
Acceptable sound speakers can do wonders to your computer experience, being way less tiring, even at lower volumes...

Things you can try:
Ensure proper earth connection, this is usually the 3rd tab on your wall socket. Both the computer and the speakers.
Use a shielded cable that connects the speakers to the desktop. Look for a thicker cable (preferably with filter), not a good quality indication but better than nothing.
In case you're using a Wifi USB pen, try move it around. Like plug it on front usb instead of the back, even a USB extention cord may help.
Other than this it's probably not worth it.

Edit: try looping the speaker cables if it's too long, may help a little. I've heard more like tah tara-tah tara-tah tara-tah :D

Except if if it's the integrated sound "chip" on a Raspberry pi ¯\_(ツ)_/¯

Most speakers use USB only to power the amplifier, not to get the audio signal.

You do realize you can probably pick up speakers immune to spectrum interference at Goodwill, right?