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In Reply to: DIY Bass Traps posted by tpcarter on September 17, 2023 at 16:50:04:
I understand that some folks have the Wife Acceptance Factor (or Spousal) to deal with, and this can be a problem.
Your solution is a fine one, as far as it goes, however, there is the simple math of the situation. One inch of foam, even wrapped in a blanket, is not enough sheer absorbing material to really absorb that much bass.
The general rule of thumb is that you need absorbing material that is 1/4 wavelength thick for any significant absorption.
The exceptions involve sealed resistive traps ala the ASC Tube Traps brand (or their DIY equivalent), otherwise, you are up against the basic laws of physics.
Even if the 1" of foam and blanket was sealed into the corner, from top to bottom, it would not absorb much bass. Being a mere 9" by 12", these are only going to be able to absorb some midrange and some highs, and would seem to be more along the lines of a DIY Corner Room Tunes ala Micheal Greene.
Absorption of a structure that is about 1.5" or so thick would be good down to about 2 kHz or so, hardly deep bass region. Even if it were as thick as it was long (12"), then the small overall size of the treatment would preclude absorbing very much bass energy.
In a small room, ANY treatment can make a big difference, and help the overall presentation of the system and allow the music to bloom.
Yes, I realize that my DIY Bass Traps can end up looking ugly, but alot of that depends on just how much effort is made to create a nice looking device instead of the easiest or quickest approach.
As a reminder, see:
The original Jon Risch DIY Acoustic Treatment Note:
http://www.audioasylum.com/audio/tweaks/messages/17/174817.html
If the DIY ASC bass trap clones are built on the specified frame and some of the nicer cloth is used as covering, such as
Guilford of Maine Fabric or Acoustone Speaker Grille Cloth, then they can look very nice.
For those who do not have the WAF to contend with, then something like my Super Quick and Dirty traps are an easy option, and even they can be made to look "OK" if nice cloth is used, and they ae taped up neatly.
See:
Super Quick & Dirty easy bass traps recipe:
http://www.audioasylum.com/audio/tweaks/messages/15737.html
and petew's version:
http://www.AudioAsylum.com/audio/general/messages/70817.html
The above recipes create true bass traps that can absorb down to fairly low frequencies, much lower than the rule-of-thumb formulae would indicate.
Jon Risch
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Follow Ups
- Not big enough to do much in the bass. - Jon Risch 19:13:06 09/18/23 (0)
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