Em 3 Coupler - BRUEL & KJAER 4152 Instructions And Applications

24.-9.-1949
(but not in the present 3.3-1960 ANSI Standard ), and the German
Standard DIN 45600, and when u sing the 6 cm
s
coupler, the force may be
adjus ted to
500
gra mmes as prescribed in ANSI Standard Z.
24.-9.-1949
Figs. 3 and 4.
Retaining
arrangement
Coupler
Adopter
i
(000111)
Microphone
Cartridge
Coupl.r
Mic rophone
Preomplifier(2619)
Adjustable
retaining
spring
support
163 761
Pig.
1.2.
Sectional view of the Artificial Ear and the Condenser Microphone .
Fig. 1.2 show.s a sectional view of the socket with the mounting arrangement
for the condenser microphone. The guard ring (internal shield) principle
used in the Microphone Preamplifier Type 2619 is ex tended to include the
socket which keeps the effective transmission loss of the 4152 as low as
approximately 0.1 dB .
As indica ting meter, the Microphone Preamplifier Type 2619 and the Measur-
ing Amplifier Type 2606 can be used as well as the Sound Level Meter Type
2203. See Fig. 1.3.
The 2 em3 Coupler.
One of the couplers supplied with the Artificial Ear Type 4152 is a 2 cm
3
Coupler (DB 0138) which fulfils the requirement of International Standard
(I.E.C. Recommendation Publication 126). A sectional view of the Coupler
is shown in Fig. 1.4.