Ultrasound Microphone Class 1 Industrial Standard 5Hz to 100 kHz

Ultrasonic microphones are a specialized type of microphone designed to detect sounds in the frequency range above 100 kHz and up to 168 dB sound pressure level.

These microphones are commonly used for a variety of applications, such as sound measurement in industrial environments, health monitoring, and performance verification of laboratory equipment.

IEC 61094-4 WS3F is a globally recognized standard for ultrasonic microphones that outlines the specific performance parameters these microphones must meet to be considered accurate and reliable.

This includes factors such as sensitivity, frequency response, dynamic range, and noise floor.

If you’re looking for an ultrasound microphone that meets these standards, there are a variety of options available on the market today.

When selecting an ultrasound microphone, it’s important to consider the specific requirements of your application in order to choose the best possible option for your needs.

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

MM310

1/4″ microphone

WS3F acc to IEC 61094-4

Free field

20Hz to 100 kHz

35 dBA to 158dB

Pre-polarized

MP30-Ultra

1/4″ microphone

WS3F acc to IEC 61094-4

Free field

5Hz to 100 kHz

35 dBA to 168dB

Pre-polarized

iSV1611-Ultra

1/4″ microphone

WS3F acc to IEC 61094-4

Free field

5Hz to 75 kHz

35 dBA to 158dB

Pre-polarized

Here you will find our Ultrasonic Microphone Kit. It consists of the RG-50 1/4’ measurement microphone with linear frequency response up to 30 kHz, the MP48 IEPE sensor XLR 48 V phantom power adapter and the powerful ZOOM UAC-232 USB audio converter.

Since December, the globally recognised FFT analyser and measurement microphone software ARTA has been released by the manufacturer as freeware. We would like to thank the manufacturer for this generous support.

With calibrated microphone, ARTA can be used as a virtual IEC class 1 SPL meter with a real time modes:

Integrating SPL meter with 24 hours data logging,
Octave SPL meter with noise rating (NR, NC, PNC, RC,NCB),
Third octave SPL meter with report of loudness in sones and level in phones

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.

Ultrasound Microphone - Ultrasonic Microphones Comparison

Ultrasonic Measurement Microphones Class 1 WS3F Industrial Grade

RG-50 - MP48 - ZOOM UAC-232