Chapter 8 —
1
/
2
" Microphone Preamplifier Type 2669
Dynamic Range
Falcon™ Range of Microphone Products
Microphone Handbook
BE1380– 12
8
−
5
8.3 Dynamic Range
Overview:
Inherent Noise:
a. See Fig.8.6 for upper limit at higher frequencies
Lower limit with 15pF
microphone (µV)
Upper limit (±60 V
supply, f <10 kHz)
a
Dynamic Range (dB)
A-weighted: 2.2
50V
P
147
Lin. (20Hz to 300kHz):
10.0
134
Table 8.2 Nominal open-circuit sensitivity
Fig.8.4 Typical
1
/
3
-octave-band inherent noise spectrum measured with a 15pF dummy micro-
phone. The shaded bar graph is the broad-band (20Hz to 20kHz) noise level and the white
bar graph the A-weighted noise level. The circles represent levels at
1
/
3
-octave-band centre
frequencies
– 10
– 5
0
5
10
15
940882e
10 1 k 10 k100
Noise re 1 µV
(dB)
Frequency (Hz)
A
20 k
L
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