1/4” Prepolarized Pressure Field Microphone, Side Vented

1/4” Prepolarized Pressure Field Microphone, Side Vented
Model 377A14
1/4” Prepolarized Pressure Field
Microphone, Side Vented
Model 377A14 is recommended for applications where high amplitude sound pressure
levels or high frequency measurements are required. This model can be used in flush
mounted applications where large differences of static pressure exist.
Applications
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Impedance tube
Panel testing
Flush mounting applications
Closed couplers
High amplitude or high frequency tests
Gunshot analysis
Research and development
Hearing preservation and safety
Precision sound level measurements
Highlights
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Prepolarized (0V) design
Sensitivity, 1.0 mV/Pa
Frequency range, 4 Hz–70 kHz (+/- 2dB)
Cartridge noise, 35 dB(A) Max amplitude, 174 dB Temperature range, -40 to +120°C
IEC
61672 class one compliant and IEC
60651 type one compliant
A2LA , ILAC accredited, CE marked
Image courtesy of Spectronics, Inc.
Use of model 377A14 pressure response field microphone
The PCB® model 377A14 is a side vented Pressure Field design which allows
for equalization of atmospheric pressure when flush mounted in a cavity, closed
coupler, tube, wall or panel where the static pressure inside the structure varies
greatly with the outside of the structure. The 377A14 is used for both high
amplitude and frequency measurements. For optimum results use with the PCB
model 426A05 ventless preamplifier, or order as a Model 378A14, microphone and
preamplifier mated pair.
ICP® (0V Polarization)
PCB is the inventor of ICP® sensor power technology. Prepolarized microphones operate
on this same ICP® sensor power or 2-20 mA constant current supply and use standard
coaxial cables. The low cost power supplies and cables for prepolarized microphones
can be shared with other ICP® compatible products such as accelerometers and
pressure sensors. This interchangeability results in a significant per-channel cost
savings as well as reduced test set-up time.
Quality Commitment
PCB acoustic products are used by some of the world’s largest automotive, aerospace &
defense, electronic, and consumer goods manufacturers. PCB uses the highest quality
materials for its microphones. While other manufacturers outsource their manufacturing,
PCB has invested in a state of the art, in-house CNC machining facility, allowing greater
control over quality and delivery. PCB has also invested in a clean room, anechoic
chamber, and environmental test chambers to provide quality
products. Our rigorous environmental testing and aging
process ensures that our products will survive in demanding
temperature or humidity conditions. PCB microphones are
backed by a best in class 5-year warranty and our “Total
Customer Satisfaction” (TCS) policy. Application support is
available through our 24-Hour SensorLineSM at 716-684-0001.
Model 377A14
PCB Piezotronics
Toll-Free in USA 800-828-8840
716-684-0001
www.pcb.com­
Model 377A14
Specifications - 1/4” Pressure Field Microphone Model 377A14
Acoustic
Nominal Microphone Diameter
1/4 (6)
in (mm)
0
V (prepolarized)
Polarization Voltage
Open Circuit Sensitivity (at 250 Hz)
1.0
mV/Pa
Open Circuit Sensitivity (+/- 3 dB)
-60
dB re 1V/Pa
4 to 70,000
Hz
0.25 to 3
Hz
Distortion Limit (3% distortion)
≥ 174
dB
Distortion Limit (with 426A05 Preamp)
≥ 174
dB
Cartridge Thermal Noise
≤ 35
dB(A)
Inherent Noise (with 426A05 Preamp)
≤ 53
dB(A)
Frequency range (+/- 2 dB)
Lower Limiting Frequency range (-3 dB)
Pressure Equalization Vent
Side Vented
Environmental
Operating Temperature Range
-40 to 248 (-40 to 120)
°F (°C)
66
dB re 20µPa
Diameter x Height (without Grid)
0.25 x 0.36 (6.4 x 9.1)
in (mm)
Size (Diameter x Height (with Grid)
0.28 x 0.41 (7.0 x 10.5)
in (mm)
Mounting Thread (to Preamplifier)
0.2244-60 UNS (5.7-60 UNS)
in (mm)
Influence of Axial Vibration (0.1g (1 m/s2))
Physical Specifications
TEDS Microphone & Preamplifier Combinations:
n 378A14 – TEDS 0.9 microphone and preamplifier
n TLD378A14 – TEDS 1.0 microphone and preamplifier
Optional Accessories:
n 426A05 – ¼” ventless preamplifier, low noise
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079A07 – windscreen for ¼” microphones
079B10 – microphone holder
079A15 – tripod microphone stand with boom arm
079A16 – miniature microphone stand
079A18 – clamp on flexible extension arm
079C20 – ¼” nose cone for wind tunnel testing
079C23 – microphone holder with swivel mount
CAL200 – handheld calibrator
CAL250 – handheld calibrator
ADP024 – ¼” adapter for CAL200
ADP021 – ¼” adapter for CAL250
Model 378A14 contains the 377A14 microphone and the 426A05 ¼” preamplifier
3425 Walden Avenue, Depew, NY 14043-2495 USA
Toll-Free in USA 800-828-8840
24-hour SensorLineSM 716-684-0001
Fax 716-684-0987 E-mail info@pcb.com
Web Site www.pcb.com
AS9100 CERTIFIED n ISO 9001 CERTIFIED
©2016 PCB Group, Inc. In the interest of constant product improvement, specifications are subject to change without notice. PCB, ICP, Modally Tuned, Spindler, Swiveler and TORKDISC are registered trademarks of PCB Group.
SoundTrack LXT, Spark and Blaze are registered trademarks of PCB Piezotronics. SensorLine is a service mark of PCB
Group, Inc.
TM-AC-377A14-0216
Printed in U.S.A.
PCB Piezotronics, Inc. is a global manufacturer of vibration, pressure, force,
torque, load, strain sensors and microphones, as well as the pioneer of ICP®
technology. This instrumentation is used for test, measurement, monitoring,
and control requirements in automotive, aerospace, industrial, R&D, military,
educational, commercial, OEM applications, and more. With a customer support
team of more than 30 Customer Service Representatives and Application
Engineers, PCB proudly stands behind their products with the services you value
most, including 24-hour technical support, a global distribution network, a best
in class warranty and Total Customer Satisfaction. Our Platinum Products
program is one way PCB ensures fast delivery with over 10000 sensors in stock
and covered by a Lifetime Warranty. Visit us at www.pcb.com for more details,
including our Terms and Conditions.
Visit www.pcb.com to locate your nearest sales office
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