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R/E/P => R/E/P Archives => Acoustics in Motion => Topic started by: Steffen on February 29, 2008, 09:01:46 AM

Title: non room mode dip @ 58Hz, need absorber advice
Post by: Steffen on February 29, 2008, 09:01:46 AM
serious problem here:


index.php/fa/7912/0/

(soundpath B) minus (direct path A) = 1/2 wavelength of 58Hz which give a
ugly dip @58Hz at the listening position.

what would be the most effective absorber type to but into the ceiling/frontwall
corner? diy preferred (I dont fear heavy woodwork Wink )

steff
Title: Re: non room mode dip @ 58Hz, need absorber advice
Post by: gullfo on February 29, 2008, 12:28:50 PM
for a start, since there's some ringing there as well (based on your previous measurements) maybe use a "superchunk" style absorber in the upper wall-ceiling corner. it may provide enough attenuation to reduce this dip plus it's broadband in nature.

http://img172.imageshack.us/img172/1121/exampleceilingcornersupjy4.th.jpg
http://img153.imageshack.us/img153/7039/exampleceilingcornersupfd2.th.jpg
Title: Re: non room mode dip @ 58Hz, need absorber advice
Post by: Steffen on March 04, 2008, 06:35:34 AM
will check it out..

thanx Glenn!

steff