|Multi-Way Conventional loudspeakers with crossovers|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|1st October 2003, 04:04 AM||#1|
Join Date: Nov 2002
old Tline program-valid?
is this program any use at all thesedays?
i was looking that the 'magic' deathboxes over at car audio forums,and magic'snailshells' that hit 140db with 6.5" speakers,and i saw this loading on the cone in this program with a little compliance behind the speaker ....could be different things,,no one seems to know enough to say any facts..
a larger compliance shifts the frequency of 'booming ' in this case (high Q speaker) downwards.
TLBOXMOD is a computer model of a transmission-line
loudspeaker system that uses the acoustic model proposed by
Bradbury (The Use of Fibrous Materials in Loudspeaker
Enclosures, JAES, vol. 24, pp. 162-170, 1976). In addition
it has provisions for tapering the line, inserting a coupling
volume between the driver and line, and for a line
cross-section different than the driver piston area. Also,
the air speed in the line is selectable as is the porosity of
the line filling.
|1st October 2003, 10:58 AM||#3|
Account disabled at member's request
Join Date: Feb 2002
Location: Clifton Park, NY
In my opinion, the TLBOXMOD program does not work. It is based on the moving fiber theory proposed by radbury which was in favor at the time. This theory assumed dramatic reductions in the speed of sound at low frequencies as the fibers coupled with the air and effectively increased the moving mass. I tried using this theory for years and was never able to correlate it against test data, it was always way off at low frequencies.
Bullock wrote an AES paper where he tried to correlate his program against test data. If I remember correctly, he concluded that the correlation was poor.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|No thread specified. If you followed a valid link, please notify the webmaster||MJL21193||Everything Else||2||10th October 2008 04:14 AM|
|How To Get The OB Sound From A TLine Or Sealed Box??||Ben Reginato||Multi-Way||17||10th May 2008 01:29 AM|
|Stillpoint ERS EMI/RFI Suppression Cloth - snake oil or valid upgrade?||adhoc||Parts||19||16th December 2006 05:35 PM|
|Which amp for Jordan JX92S Tline ?||founzie||Tubes / Valves||24||13th November 2005 08:44 AM|
|Valid Kid-Proofing Strategy?||jjasniew||Digital Source||2||30th December 2003 09:10 PM|
|New To Site?||Need Help?|