48
49
specifi
c
ations
specifi
c
ations
Specifi cations
Specifi cations
Acoustic test of typical soundBadge A-weight frequency response (85dB SPL, 90
°
)
Adaptation of the micro-USB connector to
accept electrical test signals
Electrical test signals
Electrical test signals from a low impedance (<100 ohms) source can be used to test
the frequency response of the soundBadge via the micro-USB connector. Th
ese signals
should be in the range 5.0 mVrms - 1.0 Vrms.
Acoustic testing
Th
e soundBadge’s internal microphone is not removable. Th
e best way to test all
aspects of the dosimeter without removing the lens is to use acoustic signals. Alternately
contact your authorized dealer who can access the sealed electrical test points.
NC
NC
3.3v
VCC
Signal In
GND
Sense
10
1
10
2
10
3
10
4
-60
-50
-40
-30
-20
-10
0
Frequency (Hz)
M
a
g
nitude (dB r
e: 1kH
z)
Measured Response (85dB)
A-weight target
ISO 67672 Type 1 Limits
ISO 61252 Dosimeter Limits
