Tweakers' Asylum

RE: Calling Ethan Winer/ J Risch

68.222.74.19

Jon Risch

In Reply to: RE: Calling Ethan Winer/ J Risch posted by steven d on January 05, 2009 at 12:55:36

There is such a thing as too much of too shallow (thin), and increasing the area with out increasing or maintaining the depth could be a problem overall.

If you are hearing a "boing", instead of discrete flutter echoes, then I suspect that your problem is more in the nature of corner echoes, and placing some panels in the corners would be the best approach. Experiment with what wall they are 'flat' against, the best orientation may not be across the corner at a 45 degree angle.

As for the 1st reflection points, a width of 32" would be even better, as long as it was 6" deep or more. 16" width will not absorb down to a very low frequency, thus my recommendation for more width (30") than the typical 2X4 foot panels afford. Your 16" panels are even smaller, and thus more problematic.

Jon Risch

Follow Ups:

The Flutter Echo - steven d 19:21:06 01/06/09 (2)
That 'boing' is actually a highly pitched ringing which transitions to a boing. It's more prominent with a sharp clap of the hands compared to talking voice. Would this phenomenon be the flutter echo?
- I had flutter echo ... - andyr 18:57:16 01/07/09 (0)
  in the "listening room" when I moved into my newly built house, 20 years ago. In other words, when I clapped my hands, I'd get ringing (this was a room about 17' x 27', with a pitched ceiling (down the length) about 16' high in the centre and 9' high at the sides).
  
  I solved the flutter echo problem by creating a wall hanging made of 1" thick cork, painted in bright colours, glued to framed masonite (to stop it curling) which was about 15' long & 6' high.
  
  This "work of art" would appear to have stopped HF reflections between the long walls - so when I clap my hands now, there is no ringing.
  
  Regards,
  
  Andy
- RE: The Flutter Echo - Ethan Winer 10:08:28 01/07/09 (0)
  Yes, the "boing" sound is flutter echo. You can hear a demo in this video:
  
  http://www.vimeo.com/1522217
  
  --Ethan

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