Subject: Re: accuracy of loudspeaker measurement in anechoic chamber: dimension and absorber From: Peter Lennox <P.Lennox@xxxxxxxx> Date: Wed, 15 Oct 2008 22:16:56 +0100 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>I've a feeling that the only people with such large anechoic rooms will be military, so whether their output is accesible, I don't know regards ppl Dr Peter Lennox Director of Signal Processing and Applications Research Group (SPARG) School of Technology, Faculty of Arts, design and Technology University of Derby, UK e: p.lennox@xxxxxxxx t: 01332 593155 w: http://sparg.derby.ac.uk/SPARG/Staff_PLX.asp ________________________________________ From: AUDITORY - Research in Auditory Perception [AUDITORY@xxxxxxxx On Behalf Of Chuping Liu [tracy_liu_99@xxxxxxxx Sent: 15 October 2008 07:37 To: AUDITORY@xxxxxxxx Subject: accuracy of loudspeaker measurement in anechoic chamber: dimension and absorber Dear List, When loudspeaker is measured in anechoic chamber, for valid results at low frequencies, it means large anechoic chamber and large absorbent wedges. I found quite some literature discussing the accuracy of loudspeaker measurement in terms of different wedges. Yet I haven't found any literature talking about the measurement accuracy (in terms of frequency extend and errors) regarding the physical dimensions of the anechoic chamber, or ideally for both of chamber dimensions and absorber characteristics. If anyone is aware of the existence of such literature, I would appreciate to be pointed out. Thanks. Regards, Chuping