MPR446 Rugged Microphone
MPR446 pressure-field rugged microphone is developed by BSWA, suitable for measurement
in moving objects such as vehicles. It is prepolarized microphone without
external polarization voltage, and equipped with built-in ICCP power supply
preamplifier (optional TEDS).
MPR446 is front-vent and can measure the sound pressure level up to 140 dB. Each MPR446 passed a high sound pressure test before leaving the factory to verify its total distortion ≤ 3% when the rated maximum sound pressure level is reached.
MPR446 has
rugged stainless-steel shell thus suitable for harsh environment measurement.
It can be fixed in the test area by means of adhesive or special magnetic seat.
It can be applied for noise test of automobile engine compartment, wheel rail
and other parts that may produce strong vibration.
Moreover, the optional TEDS function
support data acquisition equipment to read microphone information directly,
including microphone model, serial number, sensitivity, etc. BSWA microphone
supports the IEEE 1451.4 standard. The v0.9 version is used by default to be
compatible with more data acquisition equipment. The v1.0 version can also be
selected according to user requirements.
Each MPR446 is supplied with an individual
calibration data chart including sensitivity, frequency response and so on.
Features:
● Press-field
microphone, suitable for use in cavity or space with strong reflection
● Calibration
by sound calibrator with adaptor
● Rugged
stainless-steel shell, easy to be fixed firmly
● Sensitivity
(@250 Hz): 11.2 mV/Pa (-39 dB re 1V/Pa)
● Frequency
response: 10 Hz ~ 10 kHz
● Dynamic
range: 29 dBA ~ 140 dB
● Polarization
voltage: 0 V (Repolarized)
● Pressure
equalization: front-vented
● Built-in
preamplifier with ICCP power supply
● Optional
TEDS (IEEE.1451.4)
Applications:
● NVH
test of railway and vehicle applications.
● Noise test in harsh environment.
Specifications：
| Sound Field | Pressure-field | |
|---|---|---|
| Diameter (mm) | 12.7 (non-standard 1/2”, adaptor is required for calibration) | |
| Sensitivity@250 Hz (mV/Pa) (±3 dB) | 11.2 (-39 dB re 1V/Pa) | |
| Polarization Voltage | 0 V (Prepolarized) | |
| Frequency Response (Hz) | 10 ~ 10 k (+3 dB / -5 dB) | |
| Dynamic Range (dBA ~ dB) | 29 ~ 140 | |
| Self-generated Noise (dBA) | 29 | |
| Maximum Sound Pressure Level (dB) | ≥ 140 (3% distribution) | |
| Pressure Equalization Vent | Front-vented | |
| Preamplifier | Built-in | |
| Maximum Output Voltage (Vpeak) | ±5 | |
| Output Impendence (Ω) | < 150 | |
| Power Supply | ICCP (2mA ~ 20mA, 4mA typical) | |
| Operating Temperature Range (°C) | -10 ~ 50 | |
| Operating Humidity Range (%RH) | 0 ~ 90 | |
| Dimension (mm) | W23 x H8.8 x D13.2 | |
| Output Connector | 10-32 UNF | |
| Weight (g) | 5.7 | |
| TEDS | Optional, IEEE 1451.4 compliant (default v0.9, optional v1.0) | |
Download information:
MPR446 Rugged Microphone Brief
