Author Topic: homasote or drywall  (Read 4833 times)

Laura

  • Guest
homasote or drywall
« on: April 04, 2001, 10:15:51 PM »
Is homasote or drywall better soundproofing for
traffic noise -- 200-400 Hz?  
thanks

bjnash

  • Guest
Re: homasote or drywall
« Reply #1 on: April 05, 2001, 12:21:16 AM »
: Is homasote or drywall better soundproofing for
: traffic noise -- 200-400 Hz?  
: thanks
 Neither is much good at that frequency, however tile backer board may have the mass needed to knock down those low freqs: try something like "Duroc" or "Wonderboard".  Remember that these low freqs have a wavelength of a foot or so- therefore a large dead-air space is needed too.  

Laura

  • Guest
Re: homasote or drywall
« Reply #2 on: April 05, 2001, 12:52:47 AM »
:  Neither is much good at that frequency, however tile backer board may have the mass needed to knock down those low freqs: try something like "Duroc" or "Wonderboard".  Remember that these low freqs have a wavelength of a foot or so- therefore a large dead-air space is needed too.  
So that's why the walls, with 3.5" dead space just filled with fiberglass insulation do pretty well.
Thanks.  
It sounds like when I do the windows, the important thing is to get plenty of dead space between 2 panes laminated glass!



Randy - Super Soundproofing CO

  • Guest
Re: homasote or drywall
« Reply #3 on: April 05, 2001, 03:47:48 AM »
: :  Neither is much good at that frequency, however tile backer board may have the mass needed to knock down those low freqs: try something like "Duroc" or "Wonderboard".  Remember that these low freqs have a wavelength of a foot or so- therefore a large dead-air space is needed too.  
: So that's why the walls, with 3.5" dead space just filled with fiberglass insulation do pretty well.
: Thanks.  
: It sounds like when I do the windows, the important thing is to get plenty of dead space between 2 panes laminated glass!

This is correct.