MPA436B 1/4 Inch Free-field Microphone, Cost-effective Choice for Array Applications
2026-05-22Product Overview
Microphone accuracy, compatibility and cost control determine measurement effects. Array technologies like near-field acoustic holography and beamforming demand consistent performance and low batch cost.
BSWA MPA436B 1/4 inch free-field microphone is developed for mass low-cost measurement. Balancing high performance and cost efficiency, it fits acoustic array tests and production quality inspection perfectly.
Core Advantages
Polarization-free Easy Operation
0V pre-polarized design requires no external polarization voltage. Integrated non-detachable ICCP preamplifier simplifies connection and commissioning, realizing plug-and-play experience for laboratory and field measurement1.
Wide-band Precise & Dynamic Performance
Delivers stable frequency response and wide dynamic range to capture diverse acoustic signals. Frequency response covers 10Hz~20kHz with reliable tolerance. Wide dynamic range from 29dBA to 140dB captures faint and intense sound pressure, and total distortion stays within 3% under rated maximum pressure to guarantee valid test data.
Optional TEDS for Higher Efficiency
Fully compliant with IEEE 1451.4 standard. Acquisition devices can automatically read product model, serial number and sensitivity data, greatly reducing manual entry work and avoiding human operation errors.
Functional Features
- Size: 1/4 inch free-field type
- Sensitivity (@250Hz): 11.2mV/Pa (-39dB re 1V/Pa)
- Dynamic range: 29dBA ~ 140dB
- Polarization voltage: 0V pre-polarized
- Pressure equalization: Front equalization
- Optional phase matching
- Built-in non-detachable ICCP preamplifier
- Optional IEEE 1451.4 TEDS function
Application Scenarios
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Acoustic Array Testing
Suitable for near-field acoustic holography, beamforming, acoustic imaging and sound source localization. Ensures uniform performance and cuts array construction cost.
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Production Line Quality Inspection
Covers sound pressure measurement of various products, accurately identifies acoustic defects and improves quality control efficiency.
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General Low-cost Acoustic Measurement
Applicable to anechoic and semi-free field tests, including scientific research, architectural acoustics and equipment noise monitoring.
Technical Specifications
| Parameter | Specification |
|---|---|
| Sensitivity | 11.2mV/Pa (-39dB re 1V/Pa) |
| Frequency Response | 20~10kHz (±2dB), 10~20kHz (±3dB) |
| Dimension | Ø7 × 34mm |
| TEDS | Optional, IEEE 1451.4 compliant, default v0.9, v1.0 available |
| Weight | 14.0g (with 0.7m coaxial cable & SMB connector) |
User Benefits
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Cost-efficient for Mass Deployment
Optimized for array measurement with steady consistent performance. Custom phase matching meets professional technical demands and reduces batch procurement cost.
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Convenient & Efficient Use
Pre-polarized structure simplifies wiring. TEDS function minimizes manual errors. Compact size and durable environmental adaptability support instant use in diverse sites.
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Reliable & Durable Quality
Passes strict high sound pressure tests with low distortion. Front equalization optimizes acoustic response, supporting long-term frequent high-standard measurement.
FAQ
Q: What are the main applicable scenes?
A: Acoustic array, production inspection, scientific research and daily noise measurement.
Q: Does it support automatic parameter identification?
A: Optional TEDS function enables direct parameter reading by acquisition equipment.
Q: What advantages does pre-polarized design bring?
A: No extra polarization power needed, easier connection and on-site deployment.
References
1 IEEE 1451.4 Transducer Electronic Datasheet Standard
