MI-1271M12 TEDS Microphone

The MI-1271M12 TEDS Microphone consists of 1/2-inch Free-field electrets-type condenser microphone and preamplifier conforming to the IEC 61094-4 Type WS2F.

 

By adopting the titanium vibrating membrane of the microphone and improving electrets performance, it realizes long-term stability and wide frequency range of 1 Hz to 20 kHz. It can be used in wide temperature range of -30℃ to +80℃.

 

The MI-1271M12 TEDS Microphone can be used by directly connecting to a device equipped with CCLD (Constant Current Line Drive) with BNC cable. Also, when connected to TEDS applicable device, information such as sensitivity is automatically loaded without troublesome calibration. As a result, reliable measurement and time reduction are possible.

*TEDS specification: IEEE 1451.4: 2004 (Template: Microphone with built-in Preamplifier Ver.1.0)

Feature

  • •TEDS applicable model without troublesome calibration

  • Capable of long-term stability and wide frequency range of 1 Hz to 20 kHz by adopting titanium vibrating membrane and improving electrets performance.

  • Wide temperature range of -30℃ to +80℃

  • Can be directly connected to the device equipped with the CCLD (constant current line drive) with BNC cable.

Specification

Response type Free sound field
Sensitivity (1 kHz) -26 .0± 1.5 dB re.1 V/Pa (50 mV/Pa)
Frequency range (reference: 1 kHz) 1 Hz to 20 kHz (±2 dB)
Maximum sound pressure level (250 Hz, total harmonic distortion 3%) 135 dB or more
Intrinsic noise level A-weighting: 14.0 dB (typical value)
Z-weighting: 34.3 dB (typical value)

Static pressure characteristics

(250 Hz)

-0.013 dB/kPa

Temperature characteristics

(250 Hz)

+0.005 dB/K

Humidity characteristics

(250 Hz)

-0.0004 dB/%
Long-term stability 0.03 dB/year or less (at reference environmental condition)
0.30 dB/year or less (80 ℃, 23% RH)

Operating temperature range

-30 to +80 ℃

Operating humidity range

0 to 90% RH (with no condensation)

Storage temperature range

-40 ℃ to +70 ℃

Storage humidity range

0 to 90% RH (with no condensation)

Power source CCLD (Constant Current Line Drive)
2 mA to 4.5 mA (rated value 4 mA) 
18 V to 26 VDC (rated value 24 V)
Output connector C02(BNC)
Weight Approx. 41 g
Accessory

Calibration chart×1

Instruction manual ×1
Preamplifier holder (MI-0301)×1
Reference environmental condition 23 ℃, 50% RH, 101.3 kPa
Applicable standard
CE marking *  • EMC Directive 2014/30/EU Standard EN61326-1
• RoHS Directive 2011/65/EU Standard EN50581
TEDS ** IEEE 1451.4: 2004 (Template: Microphone with built-in Preamplifier Ver.1.0)

* Applicable cable length is 30 m or less. Please note that if you extend it more than 30 m, it cannot be conformed to CE marking.

** For TEDS compatibility of measuring device and measurement amplifier to be connected, please contact your nearest distributor or send us an email (overseas@onosokki.co.jp).

 

 

 


Reviced:2017/12/27


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