1/2-inch Measurement Microphone
MI Series |
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A series of condenser microphones, including high-sensitivity microphones
and wide-bandwidth microphones for a variety of applications, the MI series
exhibits good environmental stability with regard to temperature and humidity.
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n1/2-inch Back
electret-type |
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New!
MI-1234 |
New!
MI-1432 |
The
MI-1234/1432 is 1/2-inch back electret-type measurement microphone
for sound field. Bias power supply is not required since it is back
electret-type microphone. Infixing titanium diaphragm with laser
welding, the MI-1234/1432 provides higher performance in
environmental proof as compared to conventional models. These models
are best to be used as measurement and analysis for environmental
noise, architectural acoustics, and radiated sound pressure from
electrical/mechanical instruments.
There are two types to be
selected; the MI-1234, which is being designed to emphasize on
characteristic of frequency, having wide frequency range of 20Hz to
20kHz. The MI-1432 achieves excellent environmental resistance with
frequency range of 20Hz to 8kHz. Both models are used with the
MI-3111 and MI-3310. |
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n1/2-inch Bias-type |
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MI-1211
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The
MI-1211, 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 bias-type microphone. |
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n1/2-inch Back
electret-type |
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MI-1233
＜Discontinued>
（replaced by MI-1234）
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The MI-1233 uses a titanium diaphragm and not only maintains
high stability, but also is designed specially to realize flat frequency
response over a wide bandwidth. |
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n1/2-inch Back
electret-type |
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MI-1431
＜Discontinued>
（replaced by MI-1432）
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The MI-1431 not only maintains high sensitivity, but also
uses a titanium diaphragm and achieves high stability, in spite of its low
cost. |
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Connection Diagram
Each product in the analyzer
section in the below configuration is linked to its HTML page.
Specifications
|
Model |
MI-1234 |
MI-1431 |
|
Frequency Range |
20Hz to 20kHz |
20Hz to 8kHz |
| Response
Type |
Free Field |
|
Polarized Voltage |
0V |
| Sensitivity |
--29dB ±3dB (0dB=1V/Pa) |
| Capacitance |
12.5pF ±1pF |
| Max.
Sound Pressure Level |
140dB (MI-3310 in used) |
| Intrinsic
Noise Level |
19dB (A) or less |
| Operating
Temperature Range |
-10 to +50°C |
| Operating
Humidity Range |
30 to 90%RH
(with no condensation) |
| Temperature
Characteristics |
0.01dB/°C or less |
| Humidity
Characteristics |
0.003dB/% RH or less |
| Secular
Change |
0.1dB/year or less |
| Outer
Dimensions |
13.2mm dia. x 13.7mm |
13.2mm dia. x 13.2mm |
| Weight |
Approx. 6g |
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Model
|
MI-1211 |
MI-1233 |
MI-1431 |
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Frequency Range |
20Hz to 14kHz |
20Hz to 20kHz |
20Hz to 8kHz |
| Response
Type |
Free Field |
| Bias
Voltage |
200V |
0V |
| Sensitivity |
-20dB ±1.5dB
(0dB=1V/Pa) |
-29dB ±3dB
(0dB=1V/Pa) |
| Capacitance |
12pF ±1pF |
11pF ±2pF |
| Max.
Sound Pressure Level |
132dB
(when used with MI-3310 preamplifier) |
140dB
(when used with MI-3310 preamplifier) |
| Intrinsic
Noise Level |
12dB (A) or less |
19dB (A) or less |
20dB (A) or less |
| Operating
Temperature Range |
-10 to +50°C |
| Operating
Humidity Range |
30 to 90%RH
(with no condensation) |
| Temperature
Characteristics |
0.007dB/°C or less |
0.01dB/°C or less |
0.012dB/°C or less |
| Humidity
Characteristics |
0.003dB/% RH or less |
0.005dB/% RH or less |
| Secular
Change |
0.1dB/year or less |
0.2dB/year or less |
| Outer
Dimensions |
13.2mm dia. x 15.2mm |
13.2mm dia. x 13.5mm |
13.2mm dia. x 12.9mm |
| Weight |
Approx. 5g |
Revised: 2009/03/31
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