Klas,
I have a number of data analysis tools that might do it. I can't look at the
problem until next week though. Just too doggone busy for the next few days!
After that be glad to help sort it out, if somebody else hasn't already
figured out how to do it, or what you need.
Greg Clark
At 12:28 PM 7/2/2003 +0200, wrote:
>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" = output and
>"X" = 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 sweep
>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:
>
>
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