Model Number
377C20
PRECISION CONDENSER MICROPHONE
Revision: NR
ECN #:
Performance
ENGLISH
SI
Nominal Microphone Diameter
1/2
1/2
Frequency Response Characteristic
Random Incidence Random Incidence
Open Circuit Sensitivity
50 mV/Pa
50 mV/Pa
[3]
Open Circuit Sensitivity
(± 1.5 dB)
-26 dB re 1 V/Pa
-26 dB re 1 V/Pa
[3]
Frequency Range(± 1 dB)
5 to 6300 Hz
5 to 6300 Hz
Frequency Range
(± 2 dB)
3.15 to 16,000 Hz
3.15 to 16,000 Hz
Lower Limiting Frequency(-3 dB)
1.0 to 2.4 Hz
1.0 to 2.4 Hz
Resonant Frequency(90° Phase Shift)
12,000 Hz
12,000 Hz
[1]
Inherent Noise
<15 dB(A) re 20 µPa<15 dB(A) re 20 µPa
Dynamic Range(3% Distortion Limit)
>144 dB re 20 µPa >144 dB re 20 µPa
Standards Designation(IEC 61094-4)
WS2D
WS2D
Environmental
Temperature Range(Operating)
-40 to +248 °F
-40 to +120 °C
Temperature Coefficient of Sensi14 to +122°F (-10 to +50°C))
0.005 dB/°F
0.009 dB/°C
[1][3]
Static Pressure Coefficient
-0.01 dB/kPa
-0.01 dB/kPa
[1][3]
Humidity Coefficient of Sensitivity(0 to 100%, non-condensing)
± 0.001 dB/%RH
± 0.001 dB/%RH
[3]
Influence of Axial Vibration(0.1g (1 m/s²))
63 dB re 20 µPa
63 dB re 20 µPa
[1]
Electrical
Capacitance(Polarized)
11 pF
11 pF
[1]
Polarization Voltage
0 V
0 V
[2]
Physical
Housing Material
Stainless Alloy
Stainless Alloy
Venting
Rear
Rear
Mounting Thread(Preamplifier)
0.4606 - 60 UNS
11.7 mm - 60 UNS
Mounting Thread
(Grid)
0.5 - 60 UNS
12.7 mm - 60 UNS
Size (Diameter x Height)(with grid)
0.52 in x 0.64 in
13.2 mm x 16.2 mm
Size (Diameter x Height)
(without grid)
0.5 in x 0.6 in
12.7 mm x 15.3 mm
Weight
0.28 oz
7.8 gm
[1]
All specifications are at room temperature unless otherwise specified.
In the interest of constant product improvement, we reserve the right to change specifications without notice.
ICP
®
is a registered trademark of PCB Group, Inc.
NOTES:
[1]Typical.
[2]Prepolarized
[3]re 250 Hz
SUPPLIED ACCESSORIES:
Model ACS-20 Calibration of Precision Condensor Microphones (1)
3425 Walden Avenue, Depew, NY 14043
Phone: 716-684-0001
Fax: 716-684-0987
E-Mail: [email protected]
OPTIONAL VERSIONS
Optional versions have identical specifications and accessories as listed for the standard
model except where noted below. More than one option may be used.
Entered: AP
Engineer: NJL
Sales: MV
Approved: MT
Spec Number:
Date: 10/15/2014
Date: 10/15/2014
Date: 10/15/2014
Date: 10/15/2014
58702
