Electric Noise Transfering to Headphone Jack

[orthokid]

Hello everyone. I've noticed that whenever there are stressful processes going on on my computer that there is some kind of noise that I can hear from my headphones. They are connected to a jack built into my case, which is linked to my motherboard. I have no sound card.
Here are the related parts:

CPU: Intel 3220
Mo/Bo: ASRock H61iCafe
Case: Raidmax Smilodon

Any help is appreciated, although this is not a pressing matter, only an inconvenience.

 

[thor220]

There's not much you can do if you have integrated sound. First you should try directly connecting to the motherboard's sound on the back of the PC to minimize possible interference. Otherwise the only other solution is to get an external sound card or dac. If only need it for headphones, you can get this for as cheap as $20 and it would be as good as or better than motherboard sound without the interference.

 

[Shaun o]

The sound you are hearing can often be electromagnetic interference, It happens when some devices are not shielded. and close together.

All electronic devices emit electromagnetic frequency's.
So if if you have a part that is prone to picking them up. it`s because the shielding used is insufficient.
To block Signal pick up or frequency cross over.

The source can be down to where the device is earthed.
Sign`s of electromagnetic interference, and or stray radio signals effecting components of a motherboard can be buzzing or a pulsing sound. or a high pitched hum, a bad earth will also produce this effect.

A good example of radio frequency or electromagnetic interference is when you place your mobile phone very close for example to an amplifier that has no shielding from outside electromagnetic, or microwave emitting, or radio frequency transmitters. You will hear from time to time the pulsing of the phone as it constantly tunes and scans for example your 3G or 4G connection mode of the phone to the nearest cell tower. And also periodically Data receiving or sending.

If you have an amp and speakers or any kind of transformer other than the power supply of the system, moving them some distance away from the tower will help eliminate the audio pulses you hear.
If you have a multiple Gang socket set up of six sockets or more with a few power bricks or transformer devices plugged into the strip you should try to keep them as far away as you can from the tower based unit. As well as large amplifying units.
Another thing that helps is to keep all of the electrical power wires straight and close together without them being knotted or crossed over the main power cord that supplys the Pc with it`s power to the Psu.

The only other way is to shield the component that may be the cause of the pick up and feed
back of stray electromagnetic frequency, or radio frequency cross over. where some electronic parts are prone to the effects.

 

[Amartya]

Sorry mate looks like there ain't much that can be done without buying new hardware. I would suggest go for an external DAC, because even sound cards, as they are inside the case, do pick up on interference; also with the dac you can connect high impedance headphones as well. However if you're using a sound system that requires more than one output you'd have to go for a sound card as most dacs have only one output.
All boils down to how much you're willing to spend for this issue!

 

[orthokid]

Thanks a lot guys for the quick response. I was thinking that is what it was. I might get that sound card upgrade in the future when I save up for better headphones as well

 

[thor220]

Thanks a lot guys for the quick response. I was thinking that is what it was. I might get that sound card upgrade in the future when I save up for better headphones as well

PM if you need any help at that time. I now my way around headphones, sound cards, and DACs (external sound cards).