MPA466 1/4-inch Free-field Microphone
MPA466 is 1/4-inch high sensitivity free-field microphone developed by BSWA and suitable for measurement in free-field and semi free-field without reflection. It is prepolarized microphone without external polarization voltage, and equipped with built-in ICCP power supply preamplifier.
MPA466 is
front-vent with a frequency range of 20 Hz ~ 20 kHz. It is widely used in
impedance tube, acoustic array, electroacoustic and common acoustic
measurements, especially for applications which need a large number of
microphones with critical cost requirements.
BSWA can perform phase-matching of
microphones before delivery for the users who have phase requirements. If the
phase is not required when ordering, the microphone phase will not be tested
and matched.
Moreover, the microphone type with TEDS
function is MPA466 which performance as same as the MPA416. The 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 MPA466 is supplied with an individual
calibration data chart including sensitivity, frequency response and so on.
Features:
● 1/4-inch free-field microphone
● Sensitivity (@250 Hz): 50 mV/Pa (-26 dB re
1V/Pa)
● Frequency response: 20 Hz ~ 20 kHz (±3 dB)
● Dynamic range: 29 dBA ~ 127 dB
● Polarization Voltage: 0V (prepolarized)
● Pressure equalization: front-vented
● Optional phase-matching
● Built-in preamplifier with ICCP power
supply
● Built-in TEDS (IEEE 1451.4)
Applications:
● Low-cost microphone
● Acoustic characteristics measurement of
materials in impedance tube
● Array applications such as near-field
acoustic holography (NAH), beamforming, etc.
● Product quality inspection of production
line
● Multichannel acoustic measurement
Specifications：
| Sound Field | Free-field |
|---|---|
| Diameter | 1/4" |
| Class (IEC 61672) | Class 1 |
| Sensitivity@250 Hz (mV/Pa) (±3 dB) | 50 (-26 dB re 1V/Pa) |
| Polarization Voltage | 0 V (prepolarized) |
| Frequency Response (Hz) | 20 ~ 20 k (±3 dB) |
| Dynamic Range (dBA ~ dB) | 29 ~ 127 |
| Self-generated Noise (dBA) | 29 |
| Maximum Sound Pressure Level (dB) | 127 (3% distortion) |
| Phase-matching1 |
100 Hz ~ 3 kHz: ±3° 3 kHz ~ 5 kHz: ±5° 5 kHz ~ 10 kHz: ±10° |
| Pressure Equalization Vent | Front-vented |
| Preamplifier | Built-in |
| Maximum Output Voltage (Vpeak) 2 | ±3.16 |
| Output Impendence (Ω) | <110 |
| Power Supply | ICCP (2mA ~ 20mA，4mA typica) |
| Operating Temperature Range (°C) | -10 ~ 50 |
| Operating Humidity Range (%RH) | 0 ~ 90 |
| Dimension (mm) | Ø7 × 61 |
| Output Connector | SMB |
| Weight（g) | 8.7 |
| TEDS | IEEE 1451.4 compliant (default v0.9, optional v1.0) |
Note
1: phase-matching is only performing for the microphone ordered with phase
requirements.
Note 2: guaranteed by the
circuit design, the actual maximum output voltage is determined by the
sensitivity and the maximum sound pressure level.
Download information:
MPA466 1/4-inch Free-field Microphone Brief
