R/E/P Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: [1]   Go Down

Author Topic: Material information  (Read 1351 times)

Adam Miller

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 255
Material information
« on: January 10, 2007, 04:41:58 am »

Howdy-

Could Fran (or anyone) point to me to any good sources of information on materials; specifically details like absorption coefficients?

Something biased towards the kinds of materials typically used in studio construction would be very helpful- particularly things like layered partition wall structures, if such measurements exist!

many thanks

Adam

 
Logged

jimmyjazz

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1885
Re: Material information
« Reply #1 on: January 10, 2007, 10:03:29 am »

Here is some data.  The ones I've verified seem to have been taken directly from manufacturer's product literature, so caveat emptor and all that jazz:

http://www.bobgolds.com/AbsorptionCoefficients.htm
Logged

Adam Miller

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 255
Re: Material information
« Reply #2 on: January 10, 2007, 06:16:01 pm »

Thanks Jimmy, that's absolutely perfect.
Logged

Ethan Winer

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 571
Re: Material information
« Reply #3 on: January 11, 2007, 11:40:43 am »

jimmyjazz wrote on Wed, 10 January 2007 10:03



http://www.bobgolds.com/AbsorptionCoefficients.htm


Just a small warning. Take all acoustic product data with a grain of salt. Not just caveat emptor, as with Foam By Mail's fraudulent data, but because labs vary significantly, especially at low frequencies. For example, measurements of the very same absorbing material tested in two different labs can vary by 50 percent at 125 Hz. At lower frequencies the disparity can be even greater. So a material that's reported as 0.8 is not necessarily better than another that measures 0.7.

--Ethan

Adam Miller

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 255
Re: Material information
« Reply #4 on: January 11, 2007, 06:00:54 pm »

Thanks Ethan- fortunately this is just a theoretical excercise, so no worries!

Cheers,

Ad
Logged
Pages: [1]   Go Up