Jean Claude Gaertner
1) All frequencies measurements made with MLSSA and ACO calibrated
mike. the samples were placed on a open box 38cm width, 60cm height
and 10cm deep. The mike was placed at 71.8cm from the front. I exported
the measurements as Bode text files and reimported into Praxis for
ease of presentation.
2) All impedances measurements made with Praxis rel 1.64 with a
Digigram VXpocket V2 PCMCIA audio card on a IBM T22 laptop.
3) 9 samples of NE08 and 2 samples of NE03 PDR-FP were measured
4) informations about figures :
NE08_Freq.gif : magnitude/frequence comparison between 7 samples
of NE08 from 100Hz to 10KHz on axe. The purpose here is to show
the dispersion between samples specially near the resonance. Note
the vertical scale 1dB per division only.
NE08_impedance.gif: impedance / frequence comparison between 8
samples of NE08 from 100Hz to 10KHz. Note the vertical scale of
0.1 Ohms only. The two lower samples had a strange behavior near
NE03_1freq.gif and NE03_2freq.gif: magnitude /freq of NE03 PDR-FP
number 1 and 2 on axe, 20° right 40°right. Note the vertical
scale is 2dB here.