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Post subject: Reducing Room Noise
Posted: Sat Dec 07, 2013 5:48 pm
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I have chosen a room in my house to be my "Music Room", but I am saddled with the unfortunate task of reducing the huge amount of electrical noise in that room from electronic equipment (computers, routers, etc). What would be the best way of going about that? Would a line noise reducer like this one help? or does the problem lie somewhere else?

Also, I am using a lot of equipment so I can't be using something with a small amp limit (<10 amps)


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Post subject: Re: Reducing Room Noise
Posted: Sat Dec 07, 2013 6:42 pm
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I use Panamax surge protectors they have good power filtration. Panamax M8 AV is $75 on amazon.

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Post subject: Re: Reducing Room Noise
Posted: Sat Dec 07, 2013 9:19 pm
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No. That will do absolutely nothing to prevent noise from computer monitors and other equipment. Those filter spikes and voltage surges from the mains supply, the noise you are talking about is being generated by and radiated from elecronic devices and will continue to be generated no matter ho clean your mains supply is.

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Post subject: Re: Reducing Room Noise
Posted: Sat Dec 07, 2013 11:54 pm
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GilgaFrank wrote:
No. That will do absolutely nothing to prevent noise from computer monitors and other equipment. Those filter spikes and voltage surges from the mains supply, the noise you are talking about is being generated by and radiated from elecronic devices and will continue to be generated no matter ho clean your mains supply is.

Much of that noise is being introduce through the electrical supply by such devices because when plugged in they are in the circuit. Like when you have a radio plugged in then run a drill or something in same plug and you get sound on the radio because the drill is running. That interference is going through out the outlets in the circuit and may be pickup in different effects depending on the device. I can plug a circuit tracer into and outlet floors away and go to the panel with the receiver and tell you what breaker that outlet is on because the plugged in end is introducing noise into the circuit. Thats what plugged in devices do, computers ,tv's, and so on. A surge suppressor will not stop this because it is made to protect from spikes but a surge suppressor that is equip with a noise filter is made to take that noise out of the circuit as well as surge protection. Cheap surge protectors don't have noise filters. The Panamax's that I use have noise filters. They make a difference.

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Post subject: Re: Reducing Room Noise
Posted: Sun Dec 08, 2013 12:16 am
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Given that you said "routers", in plural, we can probably take for granted that you have multiple UPSes too, which in effect will create separate power grids and prevent noise from bridging them. (It won't help for noise between devices plugged into the same UPS, though.)

So your main noise source will likely be through the ether. Fans and rotating hard drives being prime sources. Tape stations even more, if you should have them. Monitors, yes, but usually at too high frequencies to be audible. Modern LED-lit LCDs are usually no problem. Older LCDs and CRTS more so.

A rack with metal sides and a mesh front would be invaluable in reducing noise.
And make sure that all interconnect cables like USB and serial have ferrite beads, so you don't bring noise from one device to another that's less shielded. Unplug keyboards and mice you don't use.
Isolate power cables from signal cables in your cable runs. Even if the cables are shielded, try to keep the cables types apart.


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Post subject: Re: Reducing Room Noise
Posted: Sun Dec 08, 2013 2:21 am
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arth1 wrote:
Given that you said "routers", in plural, we can probably take for granted that you have multiple UPSes too, which in effect will create separate power grids and prevent noise from bridging them. (It won't help for noise between devices plugged into the same UPS, though.)

So your main noise source will likely be through the ether. Fans and rotating hard drives being prime sources. Tape stations even more, if you should have them. Monitors, yes, but usually at too high frequencies to be audible. Modern LED-lit LCDs are usually no problem. Older LCDs and CRTS more so.

A rack with metal sides and a mesh front would be invaluable in reducing noise.
And make sure that all interconnect cables like USB and serial have ferrite beads, so you don't bring noise from one device to another that's less shielded. Unplug keyboards and mice you don't use.
Isolate power cables from signal cables in your cable runs. Even if the cables are shielded, try to keep the cables types apart.
What makes having wireless Routers mean you probably have UPS's few people have them and it has nothing to do with having an amp plugged into a receptacle in the wall. Uninterruptible power supply will only power whats plug into that device and only send power to device if interrupted, like no power and if active line UPS in a brown out situation. There are on line conversion UPS's that have been used in commercial areas not only for back up but to keep power consistent and noise out with power filtering built in. Not getting into high kVA ones!

Electrical wires in a house are a highway for noise from devices and even those transformers out on the poll. Devices around your house react differently in creating noise or effects of introduced noise in the loop. Type and quality of transformers an so on.

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Post subject: Re: Reducing Room Noise
Posted: Sun Dec 08, 2013 8:00 pm
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arth1 wrote:
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I am not using any UPSs, however it has just occurred to me that I do have Ethernet over Power adapters set up, would that increase line noise? or does that operate on a frequency that I couldn't hear? Also, my amplifier, my keyboard, and a table lamp are the only three pieces of equipment plugged directly into a wall.


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