Okay, based on the limited amount of information you've given I have to make some assumptions. I will assume you are using a laptop computer running Windows 10 and you have the ordinary things hooked up to it.
Sometimes radio stations do cause interference with audio systems. Most often this is when the radio station is quite powerful and located near to your house. But there there are even exceptions to this rule. Most often the interference comes from a.m. radio stations. The FM radio stations seldom produce any noticeable interference on audio system. However, television stations can cause interference because the old standard for television broadcast is amplitude modulation for the video signal. But in most parts of the United States television now has gone digital and that should not be an issue.
The key point is whether not you can recognize audio sounds that sounded like either music or somebody talking. That would most surely be sounds from an AM radio station. Another scenario would be when somebody is using a single sideband transmitter in your area. Most of the night is from either an amateur or a citizens band transmitter. That kind of interference sounds like a voice but it is not understandable.
In either case, it is not the fault of the radio station but brother a flaw with the audio equipment. Some audio equipment has report shielding and in some cases the shield on the cable might be broken and you don't even notice it except for the interference from a radio station and possibly a little bit of noise pickup from something else.
Another type of interference comes from electrical appliances that send noise down the power line. But this type of noise is clearly a noise and not like human speech.
Television sets can generate a type of noise that can get into your audio system, but this is rather rare because the amount of power level used is not that high and the television usually has filters built into it to keep noise from traveling outside of the TV set on to the house wiring.
Here are some things you can try with either a laptop or desktop. Try and see if the noise is being carried by some type of peripheral, such as, a keyboard.
Also, try and see if you can isolate which input on your computer is giving you the noise. Tried to adjust the level of each device that feeds into your audio system of your computer. You may find that it is not coming from any specific device.
If all else fails, you might consider using a different audio adapter for your computer. That is cheaper than going to a computer shop and asking them to figure out the problem you can get a small audio adapter that fits into your USB port and it has an output for headphones and an input for a microphone. I have used one of these and they work fine.
By the way, do try listening to your audio with just headphones and not a loudspeaker? In some cases it may be the external loudspeaker that is actually causing the interference. I mean to say that the input to the loudspeakers has some difficulty with the shielding and the noises coming in through either the input wire or through the coupling with the power line. Some portable loudspeakers can run on batteries, and if so, that of the one way to eliminate the power adapter as being the source of the noise.
Since you have not given enough specific information about your computer, I've had to generalize the different kinds of noise that you could have, especially noise that would come from A.M. radio transmitter nearby.
I hope this is of some help to you.
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