Natural Science Forum / Physics / Acoustics / May 2008

When doing an FSTC test of a partition in an existing building, is it
recommended to keep the sound source off the floor to reduce flanking
through the floor structure from one room to another?  We are using
the Norsonic 260 speaker system.

Well I assume that is what it is. Scenario musician/s in a pub, ie non-ideal
environment. , so hard wall surfaces, using a pair of speakers on tripod
stands so about head height. Fine at low sound level, but sometime into the
set they turn the level up.

Anybody heard these speakers?
  Looking for a discussion of this technology.
It would be a neat homebrew project!
http://www.holosonics.com/technology.html

Does anyone have a source for information on the picket fence effect
in acoustics, particularly as it relates to finned walls in an
auditorium?  Each fin is 2" thick by 7" deep spaced at 9" on center.
These fins are at both sidewalls and continue over the ceiling.

Hi, all
I am new to the acoustics field. Recently, I am working on a project
related to the octave filters. My colleague has implemented the
digital octave filters on the instrument with output and input

The following website discusses the effects of sound waves on the human
body. Is the info true? I ask because it really looks weird?
http://www.makeitlouder.com/Decibel%20Level%20Chart.txt
Thanks,