DPA 4003 Gebruikershandleiding - Pagina 5
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Fig. 7. Normalised directional characteristics of Types 4003 and
4006 with Nose Cone UA0777 fitted.
dB
10
Amplitude
20
30
40
Phase
50
60
70
5 kHZ
80
Fig. 8. On-axis amplitude and phase responses of Types 4003 and
4006 plotted using a linear frequency axis for evaluation of the
phase response.
8
10 kHz
18 kHz
8 kHz
4 kHz
20 kHz
14 kHz
1 kHz
10 dB
10 dB
90∞
50 kHz
dB
10
Amplitude
20
30
40
50
Phase
60
70
2 HZ
80
0
2
4
6
8
Fig. 9. On-axis low frequency amplitude and phase response of
Types 4003 and 4006.
30
dB SPL
20
10
0
-10
-20
200 Hz
Fig. 10. Typical third-octave inherent-noise spectrum of Type 4006.
10 dB
90°
20 Hz
10
12
14
16
18
20
CCIR 468-1
A-weighted
2 kHz
20 kHz
9