Hi, the stage in the club i work in is like a concrete bunker set above a
bar. It has a low ceiling and brick walls. out of interest i would like to
do some maths and see if i can work out the resonant frequency etc. can you
give me any pointers on were to start.

Thanks

Andy

"Andy & Kim" wrote in message
...
Hi, the stage in the club i work in is like a concrete bunker set above a
bar. It has a low ceiling and brick walls. out of interest i would like to
do some maths and see if i can work out the resonant frequency etc. can
you give me any pointers on were to start.

Thanks

Andy



Cant remember the equasion off the top of my head but have you thought about
using using an RTA? It would save the brainache

"starsky" wrote in message ...

"Andy & Kim" wrote in message
...
Hi, the stage in the club i work in is like a concrete bunker set above a
bar. It has a low ceiling and brick walls. out of interest i would like to
do some maths and see if i can work out the resonant frequency etc. can
you give me any pointers on were to start.

Thanks

Andy



Cant remember the equasion off the top of my head but have you thought about
using using an RTA? It would save the brainache


A room such as he describes could never be assesed accurately
with an RTA... at least IMHO. The modes would change virtually
inch by inch along all three axis and dB by dB of increase or
decrease. As a matter of fact, until there is some serious absorption
put into play, it can only be a nightmare. You could however, get in
the ballpark, and maybe that's all he needs.


http://www.mcsquared.com/modecalc.htm

http://www.mcsquared.com/ssdesign.htm

http://www.doctorproaudio.com/doctor...ladores_en.htm

http://www.sengpielaudio.com/Calculations03.htm

http://arts.ucsc.edu/EMS/Music/tech_...des/Modes.html




Stuff...

http://www.saecollege.de/reference_m...nt%20Chart.htm

http://www.rane.com/library.html

http://www.acousticsfirst.com/

http://www.edasolutions.com/Groups/T...usticsCalc.htm

http://www.silcom.com/~aludwig/Room_acoustics.html

http://users.telenet.be/educypedia/e...latoraudio.htm

http://www.hobbyprojects.com/calcula...alculator.html

http://www.engineeringtoolbox.com/ac...bels-t_27.html




Here's a good forum for questions...

http://www.musicplayer.com/cgi-bin/u...bb=forum&f=26&

http://www.ethanwiner.com/acoustics.html



--
David Morgan (MAMS)
http://www.m-a-m-s.com
Morgan Audio Media Service
Dallas, Texas (214) 662-9901
_______________________________________
http://www.artisan-recordingstudio.com

Andy & Kim wrote:
Hi, the stage in the club i work in is like a concrete bunker set above a
bar. It has a low ceiling and brick walls. out of interest i would like to
do some maths and see if i can work out the resonant frequency etc. can you
give me any pointers on were to start.

Do a google search for "room mode calculator" and you should see a bunch of
gadgets on the web where you just punch in room dimensions and it spits out
mode frequencies.

If your low ceiling is a drop ceiling, though, it can cause an additional set
of problems, because now you have actually two rooms. There's a big one on
bottom and a small one on top and a flexible diaphragm (at low frequencies)
separating them. Harder to model, and also almost universally a sonic problem
on the low end.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

http://www.johnlsayers.com/

http://www.johnlsayers.com/

On or about 8 Apr 2006 08:43:39 -0400, Scott Dorsey allegedly wrote:

Andy & Kim wrote:
Hi, the stage in the club i work in is like a concrete bunker set above a
bar. It has a low ceiling and brick walls. out of interest i would like to
do some maths and see if i can work out the resonant frequency etc. can you
give me any pointers on were to start.

Do a google search for "room mode calculator" and you should see a bunch of
gadgets on the web where you just punch in room dimensions and it spits out
mode frequencies.

www.realtraps.com has a nifty room mode calculator you can download.


Noel Bachelor noelbachelorAT(From:_domain)
Language Recordings Inc (Darwin Australia)