BRUEL & KJAER 2203 Instructions And Applications

•
F ree field cor re ctions
-
dB Type 4145/61 + UA 0055
10
~ --~--~--~ ---+--r R _a n T d_om T- Inc r i ? \ ~ en ~~ ----~~ ~ ~ +- ---4
\ j \ L 3oo
oo ' "/ :;?"'\./:\ ~
r-- ---t---1---t-------t-+-+ 1- 80 +-
0
1st 1 \ \ !_---- 60°
R an d om Incidence \
1\
\
- 5r--- -r-- ,_ __ _, __ -+--r-+-+-r+,_ ~HH ~-+--~
'' liD ~ : -~~ ~ ~~ ~ 4-+--- ~
I I I I I I
- 10 ~ --~-- ~ --~-- ~--~~~~~ --~~\ ~-- ~
1 kHz 5 6 7 8 9 10
15 20
30
Frequency 1 62390
Fig. 5. 3. Free field corrections for 4145 with Random Incidence Correc-
tor VA 0055
inch Microphone 4133 on the Flexible Extension Rod Type UA 0196
(Fig.5.5). When the 2203 is used with these accessories it meets the
requirements of IEC 1 79 and DIN 45 633 parts 1 and 2. The directional
characterist ics required by IEC 179 are given in Tables 5.1 and 5 .2.
Frequencies
Tolerances
Hz dB
up to
2000
+ 0,5
-0,5
2000 -
4000
+ 0,5
-1,0
4000-
8000
+ 0,5
-1,5
8000- 12500 + 0,5
-2,0
073014
Table 5. 2. IEC tolerances on microphone sensitivity over an angle of
±30°
33

BRUEL & KJAER 2203 Specifications

General

Brand	BRUEL & KJAER
Model	2203
Category	Measuring Instruments
Language	English