XMP221 1/2-inch Free-field Microphone_BSWA Technology Co., Ltd.

XMP221 1/2-inch Free-field Microphone

XMP221 is the 1/2-inch free-field microphone developed by BSWA and suitable for measurement in free-field and semi free-field without reflection. It is prepolarized microphone without the need for external polarization voltage and is suitable for ICCP powered MA231A preamplifier (optional TEDS).

XMP221 is rear-vented and can measure the sound pressure level up to 146 dB in the frequency range of 6.3 Hz ~ 20 kHz.

XMP221 has a new press-fitted stainless steel diaphragm and stainless steel housing with the same coefficient of thermal expansion, ensuring the temperature stability and corrosion resistance of the microphone while reducing costs. XMP221 is a general purpose measurement microphone suitable for large-scale use, especially for mainstream sound level meters.

XMP221 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 XMP221 is supplied with an individual calibration data chart including sensitivity, frequency response and so on.

Features:

● 1/2-inch free-field microphone

● Sensitivity (@250 Hz) :50 mV/Pa (-26 dB re 1V/Pa)

● Frequency response: 10 Hz ~ 10 kHz (±1 dB)

6.3 Hz ~ 20 kHz (±2 dB)

● Dynamic range: 17.5 dBA ~ 146 dB

● Polarization voltage: 0V (prepolarized)

● Pressure equalization: rear-vented

● Suitable for 1/2-inch preamplifier with ICCP power supply

● All stainless steel construction

Applications:

● General purpose acoustic measurements.

● Electroacoustic measurements

● Mainstream sound level meters

Specifications:

Sound Field Free -field

Diameter 1/2"

Class (IEC61672) Class 1

Open-circuit Sensitivity@250 Hz (mV/Pa) (±2 dB) 50 (-26 dB re 1V/Pa)

Polarization Voltage 0 V (Prepolarized)

Frequency Response (Hz) 10 ~ 10 k (±1 dB)，6.3 ~ 20k (±2 dB)

Dynamic Range (dBA ~ dB)¹ 17.5 ~ 146

Cartridge Thermal Noise (dBA) 17.5

Maximum Sound Pressure Level (dB) (3% distortion)¹ 146

Capacitance (pF) 14

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 × 16.2

Mounting Thread for Preamplifier 11.7mm-60UNS

Weight (g) 8.7

Suitable Preamplifier MA231A (Optional TEDS, IEEE 1451.4 v0.9 / v1.0)

Note 1: the maximum sound pressure level will reduce to 135 dB with MA231A preamplifier.

Sound Field	Free -field
Diameter	1/2"
Class (IEC61672)	Class 1
Open-circuit Sensitivity@250 Hz (mV/Pa) (±2 dB)	50 (-26 dB re 1V/Pa)
Polarization Voltage	0 V (Prepolarized)
Frequency Response (Hz)	10 ~ 10 k (±1 dB)，6.3 ~ 20k (±2 dB)
Dynamic Range (dBA ~ dB)¹	17.5 ~ 146
Cartridge Thermal Noise (dBA)	17.5
Maximum Sound Pressure Level (dB) (3% distortion)¹	146
Capacitance (pF)	14
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 × 16.2
Mounting Thread for Preamplifier	11.7mm-60UNS
Weight (g)	8.7
Suitable Preamplifier	MA231A (Optional TEDS, IEEE 1451.4 v0.9 / v1.0)
Note 1: the maximum sound pressure level will reduce to 135 dB with MA231A preamplifier.

Download information:

XMP221 1/2-inch Free-field Microphone Brief