all,
I have always measured the frequency response of a parabolic set up at a
distance of 30 meters, outside. A loudspeaker has been fed with a sine wave
sweep, controlled by a reference mic. The parabol has been 30 meters away
from the loudspeaker, feeding an HP analog printer drawing "Y" =3D output a=
nd
"X" =3D frequency, as usual.
But to get a good printer resolution, I have to make the sweeps at least 30
seconds. The problem is then that I easily blow out the loudspeakers. The
loudpeaker winding gets hot and piezo horns don't work well.
Now I have though of doing this in another way: My sweep generator can swee=
p
20Hz -20kHz in 1 sec, shortest time. Any good loudspeaker can handle one
sec, even with a lot of effect. The winding never gets hot.
I can record the sweep on the DAT and feed it into my PC.
But I need a software to convert the recording into a common XY logaritmic
diagram. Wavelab has a 3D frequency analysis and I can choose different
options to view it, but noone is as simple as I want it.
Ideas?
Klas.
Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email:
________________________________________________________________________
________________________________________________________________________
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
|