MK253 1/2-inch Pressure-field Microphone
MK253 is the
1/2-inch pressure-field microphone developed by BSWA. It is suitable for the
pressure field environments such as in a cavity, near a hard reflective
surface, or installed flush with a hard surface. It needs 200 V polarization
voltage, and suitable for MV211 preamplifier (optional TEDS).
MK253 is
rear-vented and can measure the sound pressure level up to 146 dB in the
frequency range of 8 Hz ~ 10 kHz.
MK253 is
suitable for high-precision universal acoustic measurement and it can choose a
preamplifier with TEDS to 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’s requirements.
Each MK253 is supplied with an individual
calibration data chart including sensitivity, frequency response and so on.
Features:
● 1/2-inch
pressure-field microphone
● Sensitivity
(@250 Hz): 50 mV/Pa (-26 dB re 1 V/Pa)
● Frequency
response: 8 Hz ~ 10 kHz (±2 dB)
● Dynamic
range: 17 dBA ~ 146 dB
● Polarization
voltage: 200 V
● Pressure
equalization: rear-vented
● Suitable
for 1/2-inch preamplifier with ICCP power supply
Applications:
● High-precision
general purpose acoustic measurements
Specifications：
| Sound Field | Pressure-field | |
|---|---|---|
| Diameter | 1/2" | |
| Open-circuit Sensitivity@250 Hz (mV/Pa) (±2 dB) | 50 (-26 dB re 1 V/Pa) | |
| Polarization Voltage | 200 V | |
| Frequency Response (Hz) | 8 ~ 10 k | |
| Dynamic Range (dBA ~ dB) | 17 ~ 146 | |
| Cartridge Thermal Noise (dBA) | 17 | |
| Maximum Sound Pressure Level (dB) (3% distortion) | 146 | |
| Capacitance (pF) | 16 | |
| Equivalent Air Volume@250 Hz (mm3) | 46 | |
| Pressure Equalization Vent | Rear vented | |
| Operating Temperature Range (°C) | -30 ~ 80 | |
| Operating Humidity Range (%RH) | 0 ~ 98 | |
| Temperature Coefficient (250 Hz) (dB/°C) | -0.02 | |
| Pressure Coefficient (250 Hz) (dB/kPa) | -0.01 | |
| Influence of Humidity (dB) | <0.1 | |
| Standard | IEC 61094-4 Type WS2F | |
| Dimensions (mm) | with Grid | Ø13.2 × 17.2 |
| without Grid | Ø12.7 × 16.1 | |
| Mounting Thread for Preamplifier | 11.7 mm-60 UNS | |
| Weight (g) | 8.8 | |
| Suitable Preamplifier | MV211 (Optional TEDS, IEEE 1451.4 v0.9 / v1.0) | |
Download information:
MK253 1/2-inch Pressure-field Microphone Brief
