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  MakeItSimple - Case Noise Reduction

by: Larry Mingus Published: September 6, 1998


Update: March 27, 2000, New link - Case Noise Reduction: Updates

Update: March 10, 2000 - Looking over the server logs of the past month I noticed a renewed interest in this OLD project. Just want you all to know that currently I'm working on the long overdue part two of this project. When will it be published you ask? Well I'm going to try something different this time... instead of waiting until I have a complete project (never seem to get there) I'm going to instead, make this a diary of sorts posting results as I go along.

Original project:

Over the years many times I have said, "Some day I am going to figure out how to make this computer quieter" This computer referring to whatever computer I owned at the time. Finally after years of bellyaching about the noise I got ambitious enough to try to do something about it.

Trying to stay true to the sites motto Make It Simple, I wanted to come up with something that anyone could do without any special skills, tools, or materials.

The only tools required are a scissors, ruler, and hot glue gun. If you don't have a hot glue gun, talk to your wife or girl friend they probably have one ;) You can buy a cheap one for $3 to $5 bucks at a supply store or craft store.

Materials are just as simple as the tools. All you need is two feet of 3/8 inch carpet pad and a cardboard box. The carpet pad that I bought was 6 foot wide and cost $2. You can get buy with less than a 2x6 foot piece of carpet pad, however you may have to glue several pieces of pad together for the case main side. You might be able to find scraps for free.

Test system used:

  • Enlight 7237 ATX case
  • Shuttle 567 mother board
  • Boxed Intel P-200 running 225 75x3
  • 64MB RAM
  • (2) WD 6.4GB
  • CD-ROM
  • Screamin 3D primary video
  • MaxiGamer Voodoo 1
  • Monster Sound M80
  • 3Com NIC
  • Zoom 28.8 modem

Lets get to the details:

Click on photos for larger view.

Case Noise Padding Inside View.jpg (47511 bytes)Cut the carpet pad into pieces that cover most of the large flat surfaces. Use a few spots of hot glue to secure.

 

 

 

 

Case Noise Cover 1.jpg (31962 bytes)The pad is only applied to the case cover side that covers the main access to the motherboard. To make removing the cover easier leave at least 2 inches of space from the top of the cover otherwise the pad will catch and you will have to bend the sides to much to remove the cover. See Update

 

 

 

Case Noise Cover 2.jpg (20760 bytes) UPDATE: I came up with a better way of doing the case main side by making it removable. Doing it this way makes it much easier to remove and install the case cover. The cardboard is hot glued to the carpet pad for reinforcement. The notch at the top right of the cardboard is not necessary it was the only piece I had at the time. You can use a square piece of cardboard just make sure you leave a border so you can tuck in the carpet pad.

 

Case Noise Fan Box 1.jpg (20026 bytes)The power supply fan box is a very important part of this project. The box absorbs a lot of fan noise Also, the box directs the air flow down where a carpeted floor can help even more by absorbing whatever noise makes it past the fan box. Just use good old scotch tape to secure the box to the case and your in business.

 

Case Noise Fan Box Inside.jpg (35584 bytes)Leaving a 1/2 inch or more tab at the top of the box makes taping the box to the case easier and more secure.

 

 

I was concerned that lining the inside of the cabinet might increase the temperature, but the test system has been running for 18hrs with only a small 2 degree rise in temperature. The mother board temp is running 86-89 and the CPU 98 -100 well within the comfort range. I will be applying this project to all of my systems and will post an update if I find any heat related problems with P2/ Voodoo2 systems.

UPDATE: I just finished applying this project to a P2-300 with a Creative Labs Voodoo2 and haven't had any temperature problems the temp is holding fine at 100F or less.

The noise reduction is absolutely amazing.

And that's it a relatively simple project with remarkable results. I'm having a hard time putting into words how well this really works. I guess the best example is, I have a workstation at my dinning room table that I could hear running from the bedroom and now even sitting at the table I hardly notice it. Plus, it was enough to make my wife say, more than once," Wow! that is a big difference." ;)

All you need is a little ambition plus a few hours of time and you will be rewarded with hundreds of hours of nice quiet computing.

Disclaimer: The necessary legal mumbo. You assume all responsibility for any problems you may have resulting from these instructions. Makeitsimple and Larry Mingus shall not be held responsible for any damages or loss caused by these instructions.

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