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5 Hz - 30 kHz
IEPE analog
RG-50
1/4″ IEPE microphone
WS3F acc to IEC 61094-5
Free field
5Hz to 30 kHz
up to 130 dB
with IEPE preamp
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Price: 543 $
38 $ Shipping Price
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20 Hz - 100 kHz
IEPE analog
MM310
1/4″ microphone
WS3F acc to IEC 61094-4
Free field
20Hz to 100 kHz
35 dBA to 158dB
Pre-polarized
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Price: 1469 $
38 $ Shipping Price
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5 Hz - 100 kHz
IEPE analog
MP30-Ultra
1/4″ microphone
WS3F acc to IEC 61094-4
Free field
5Hz to 100 kHz
35 dBA to 168dB
Pre-polarized
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Price: 1852 $
38 $ Shipping Price
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5 Hz - 80 kHz
USB Interface
iSV1611-Ultra
1/4″ microphone
WS3F acc to IEC 61094-4
Free field
5Hz to 80 kHz
35 dBA to 168dB
Pre-polarized
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Price: 1815 $
68 $ Shipping Price
MM310
Ultrasound Microphone Set
The 1/4” measuring microphone capsule MK 301 E is designed for acoustic measurements in research, development and industry and is also used in building acoustics and audiometry, among other things.
- WS3F according to IEC 61094-4
- Frequency response 20 Hz to 100 kHz with MM310 microphone amplifier
- Sensitivity 3,5 mV/ Pa
- IEPE Constant Current Power 4 – 20 mA / 18V – 30V
- Free Field
- Sound pressure level up to 158 dB
- Range 35dBA to 158dB
- Pre-polarized
The measuring microphone capsule MK 301 is suitable for class 1 sound level meters according to IEC 61672.
MP30-Ultra
Ultrasound Microphone Set
The 1/4” measuring microphone capsule MK 301 E is designed for acoustic measurements in research, development and industry and is also used in building acoustics and audiometry, among other things.
- WS3F according to IEC 61094-4
- Frequency response 5 Hz to 100 kHz with MP30 microphone amplifier
- Sensitivity 3,5 mV/ Pa
- IEPE Constant Current Power 4 – 20 mA / 18V – 30V
- Free Field
- Sound pressure level up to 168 dB
- Range 35dBA to 168dB
- Pre-polarized
The measuring microphone capsule MK 301 is suitable for class 1 sound level meters according to IEC 61672.
Microphone Frequency Response 5 Hz to 100 kHz
MK 301 E | WS3F according to IEC 61094-4 |
|---|---|
Diameter | 1/4″ |
Frequency Range | 5 Hz … 100 kHz (± 2 dB) |
Responce Type | Capacitive pressure transducer |
Electrode Forming Voltage | 0 V |
Sensitivity (dB re 20 μPa) | 3.5 mV/Pa (± 3 dB) |
Capacitance at 1 kHz | 4.5 pF |
Max. SPL for THD ≤ 3 % at 1 kHz | 168 dB peak |
Intrinsinc Noise Level | 36 dB (A) |
Operating Temperature Range | -20 °C ～ +100 °C |
Operating Humidity Range | 25 % ～ 90 %(RH) |
Storage Humidity Range | 25 % ～ 90 %(RH) |
Venting | Rear |
Outer Dimensions with protection grid | Ф 7 mm x 9.7 mm ± 0,02 mm |
Weight | 2 gram |
MP30 | Preamplifier |
|---|---|
Frequency Response
(re. 250 Hz) | 0.1 Hz ~ 10 Hz ± 3 dB 10 Hz ~ 20 kHz ± 0.1 dB 10 Hz ~ 200 kHz ± 0.2 dB |
Gain | 0.04 dB |
Intrinsic Noise (20Hz ~ 20kHz) | < 5 μV A-weighting |
Distortion (THD) @1kHz
1 V | < 0.1% |
Output Impedance | ＜50Ω |
Max. Output Voltage | 6.5 Volt RMS @ 21 Volt IEPE DC Offset |
IEPE Power Voltage | 18 V ~ 30 V | Bias : 12.5 Volt |
IEPE Current | 2 mA ~ 20 mA |
Polarization Voltage | 0 V |
Dimensions | Ф 12.7mm × 70 mm |
Weight | < 20 g (cable not included) |
Operating Temperature | – 20°C ~ + 60°C |
Humidity | 25 %～ 90 %(RH) |
Atmospheric Pressure | 65 kPa～108 kPa |
Connector Type | BNC |
Thread for Microphone Capsule Mounting | 11.7 mm-60 UNS |
Comparison of ultrasonic microphones
In the following we present a comparative measurement of the 1/4-inch ultrasonic microphones RG-50 and MM310.
The measurement is made with a 2-channel high-performance RME ADI-2/4 PRO SE transducer and the two-channel IEPE power supply type MC102A.
The NVH FFT analysis software controls the RME high-performance transducer via the ASIO interface with a sampling rate of 384 kHz and is calibrated with a microphone calibrator before the measurement.
The compressed air from a compressor is used as the ultrasonic sound source.
