If your computer is experiencing an electronic noise when moving its mouse, it may be coming from its motherboard. In most cases, this type of noise is not known to be an EMI issue, but there are some ways to fix the problem. You can try switching to digital audio out, or try grounding the wall socket to help reduce the noise.
EMI
There are some ways to minimize the effects of EMI when moving the mouse. First, make sure that your mouse has shielded cables. This way, the EMI won’t leak into the computer’s wiring. If the cables are not shielded, you should use ferrite beads to reduce the EMI. You should also try to activate the spread spectrum option on your motherboard.
If the problem persists, you should check your power plan settings. It is likely that your mouse is experiencing EMI due to speakers being too close to it. Then, switch to digital audio output. If this doesn’t help, try disconnecting the device that causes the EMI.
Switching power supplies
When you move your mouse on your computer, you’ll hear a distinctive electronic noise. This is due to the way in which the electromagnetic field inside the machine is changed. This noise is often caused by switching power supplies. These power supplies use a transformer to change the input voltage into an output voltage, and the vibrations from the transformer can be heard depending on the frequency. However, newer switching power supplies can be less noisy, since they use a higher switching frequency and smaller transformers.
Another problem that may cause the electronic noise is electromagnetic interference, which is often caused by nearby objects. You can reduce this noise by ensuring that your power supply is located away from such objects. In some cases, it is possible to eliminate the noise completely by repositioning the power supply.
Inductor
You can use an inductor to reduce the electronic noise made by your mouse. The LED light on your mouse draws around 40 to 50 mA each time it’s moved. To reduce this amount of current, you can place a large cap across the +5v and GND pins of the mouse. In parallel to this, you should put a 0.1uF cap. Next, you need a 5.6 ohm, 1/4 watt resistor.
You may hear a high-pitched electronic noise when moving your mouse. This is the result of a malfunctioning capacitor. Bad capacitors release toxic gas through the top, which creates a high-pitched whistling noise. Unfortunately, capacitors don’t last for long periods of time. A similar sound can be produced by ceramic capacitors because of their piezoelectric effect. However, this noise is rarely heard in modern PCs.
Speakers
If you are hearing a buzzing sound when you move your mouse, you may be experiencing EMI (electro-magnetic interference). This phenomenon is caused by the speakers being too close to the mouse. Moreover, EMI is also harmful to headphones, so you should pay special attention to the placement of speakers.
A general approach to EMI is to separate the affected components. This can be done by placing speakers at the end of your desk or on a wooden or metal shelf. It is also a good idea to buy speakers from a reputable brand, which are tested for excessive EMI emissions. Another effective way to reduce the risk of EMI is to double up the wires used for the speakers. This can also help to increase their lifespan.
Upgrade your speakers
If you’re experiencing electronic noise when moving your mouse, it could be because of overlapping cables. It is possible to prevent this from happening by avoiding overlapping mouse and headphone cables altogether. You can also upgrade your speakers to reduce EMI by replacing the components in them. While small statics are harmless, larger statics can fry the speaker chips. It is best to use low volume settings, as higher volume will create more static.
If you’re using headphones, try plugging in an audio source other than your PC. This will help rule out the PC as the cause of the noise. If the problem still persists, you can try to fix the speaker cable.
