1/2-inch Measurement Microphone
MI Series
The MI series 1/2 condenser measurement microphones have a high-sensitivity type and wide-bandwidth type for a variety of applications, and provide higher performance in environmental stability with regard to temperature and humidity by infixing titanium diaphragm with laser welding.
MI-1235/1433 : 1/2-inch Back electret-type Measurement microphone |
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These models are best to be used as measurement and analysis for environmental noise, architectural acoustics, and radiated sound from electrical/mechanical instruments. A bias power supply is not required since it is a back electret-type microphone. There are two types to be selected; the MI-1235, which is being designed to emphasize on a wide frequency range of 10 Hz to 20 kHz, conforms to IEC 61094-4 Type WS2F. The MI-1433 is a cost effective one achieving excellent environmental resistance same as the MI-1235 with frequency range of 20 Hz to 8 kHz. It conforms to IEC 61094-4 Type WS2F. Both models are used with the MI-3111 and MI-3310. |
MI-1211 1/2-inch Bias-type Measurement microphone |
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The MI-1211, a bias-type microphone with high sensitivity, is ideal for measurement of low level noise. New technology of infixing titanium diaphragm with laser welding directly makes it possible to achieve wide range, high sensitivity and high stability. Voltage needs to be supplied as it is a bias-type microphone. | |
Connection Diagram
Each product in the analyzer section in the below configuration is linked to its HTML page.
Specifications
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1/2-ich back electret type |
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| Model | MI-1235 | MI-1433 | MI-1234 <Discontinued> |
MI-1432 <Discontinued> |
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| Frequency range | 10 Hz to 20 kHz | 20 Hz to 8 kHz | 20 Hz to 20 kHz | 20 Hz to 8 kHz |
| Standard | IEC 61094-4 Type WS2F (Structure of the electrodes part <joint part with the preamplifier>) |
IEC 61094-1 Type LS2F (Structure of the electrodes part <joint part with the preamplifier>) |
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| Response type | Sound field type | |||
| Bias voltage | 0V | |||
| Sensitivity | - 29 ± 3 dB re. 1V/Pa (at 1 kHz) | |||
| Capacitance | 13 pF | 12.5 pF | ||
| Maximum sound pressure | 143 dB (MI-3310 in used) 135 dB (MI-3111 in used) |
140 dB (MI-3310 in used) | ||
| Intrinsic noise level | 19 dB or less (A-weighting) | |||
| Static pressure characteristics | -0.03 dB/kPa or less | - | ||
| Operating temperature range | -10 to +50 °C | |||
| Operating humidity range | 20 to 90% (with no condensation) | 30 to 90% (with no condensation) | ||
| Temperature characteristics | +0.009 dB/K or less | +0.01 dB/K or less | ||
| Humidity characteristics | 0.001 dB/% or less | 0.003 dB/% or less | ||
| Storage temperature range | -20 to +60 °C | |||
| Storage humidity range | 20 to 90 % (with no condensation) | |||
| Outer dimension | Φ13.2 x 13.7 mm | Φ13.2 x 13.5 mm | Φ13.2 x 13.7 mm | Φ13.2 x 13.2 mm |
| Weight | Approx. 6 g | |||
| Accessories | Instruction manual x 1, calibration chart x 1copy | |||
1/2-ich bias type |
1/2-ich back electret type |
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Model |
MI-1211* | MI-1233 <Discontinued> |
MI-1431 <Discontinued> |
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| Frequency range | 20 Hz to 14 kHz | 20 Hz to 20 kHz | 20 Hz to 8 kHz |
| Response type | Sound field type | ||
| Bias voltage | 200 V | 0 V | |
| Sensitivity | -20 dB ± 1.5 dB re. 1 V/Pa (1 kHz) |
-29 dB ± 3 dB re. 1 V/Pa (1 kHz) |
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| Capacitance | 12 pF | 11 pF | |
| Max. sound pressure | 132 dB (MI-3310 in used) |
140 dB (MI-3310 in used) |
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| Intrinsic noise level | 12 dB (A) or less | 19 dB (A) or less | 20 dB (A) or less |
| Operating temperature range | -10 to +50 °C | ||
| Operating humidity range | 30 to 90% (with no condensation) | ||
| Temperature characteristics | 0.007 dB/K or less | 0.01 dB/K or less | 0.012 dB/K or less |
| Humidity characteristics | 0.003 dB/% or less | 0.005 dB/% or less | |
| Storage temperature range | -20 to +80 °C | -20 to +60 °C | |
| Storage humidity range | 0 to 90 % (with no condensation) | ||
| Outer dimensions | Φ13.2 x 15.2 mm | Φ13.2 x 13.5 mm | Φ 13.2 x 12.9mm |
| Weight | Approx. 5 g | ||
* Requires AU-2200(discontinued product) for the use.
Revised:2012/07/29
