The computer connects to the speakers, it is definitely for him to announce the sound he wants. If he announces other sharp sounds, it will greatly affect his mood. Check whether there are other home appliances working near the speakers, such as TVs, mobile phones, etc. Their signal radiation will disturb the speakers, and these objects need to be kept away from the speaker equipment.
The announcement sound may be caused by the loose connection of the speaker at the speaker. Unplug the various connectors at the speaker and pierce it from the head. Regarding the condition of connecting the subwoofer and the speakers together, we have to remove the connection cable between the subwoofer and the speakers and connect them from the beginning. Unplug the speaker connection cable on the computer side and reconnect it.
It may be that the sound card of the computer has a problem. You can unplug the speakers and switch to other speakers or headphones for testing. If the current sound is also announced, then drive the sound card from the beginning, or go to repair the sound card. Replace the audio cable connecting the speakers and the computer. If you still can't solve it after the above method, it is probably because the speaker is broken, so quickly replace it with a new one.