We offer complete solutions from microphones to analysing and monitoring acoustic signals for industry, research and development.
We measure sound levels below 6.5 dBA, which are designed for measuring very quiet sound sources.
Noises with sound levels above 186 dB, such as those generated by rocket engines or firearms, can be measured without distortion using our 1/4″ microphones.
Our class 1 microphones are calibrated and traceable to national and international standards to ensure consistent and precise measurement results.
Sound level meters for extremely loud noises up to 186 dB as well as multi-channel data acquisition systems, e.g. for sound power measurement, and impedance tube systems round off our range.
MP30-R-Infra Set
Weatherproof IEPE Infrasound Microphone
The sound inlet, positioned at a 90° angle to the microphone axis, is ideally suited for monitoring ambient noise starting at 0.5 Hz as well as sound up to 20 kHz.
The MP30-R-Infra utilizes the MKS 222 E 1/2″ microphone capsule (Class 1 per IEC 61672, Type WS2F), which is specifically designed for infrasound measurements.
It is the optimal choice for long-term outdoor applications—such as infrasound arrays for locating infrasound sources—even in rain or extreme temperatures.
For measuring high sound pressure levels up to 150 dB, the MP30-R-Infra-Blast model is available with reduced sensitivity.
The measurement microphone can be calibrated using the 4010 or CA111 sound calibrators, or other suitable sound pressure calibrators.
- Sensitivity 45 mV/Pa
- IEPE supply 2-20mA BNC
- Frequency Response: 0.5 Hz – 20 kHz
- Class 1 WS2F – DIN IEC 61094-4
- Acoustic noise floor 15 dB(A)
- Measurement range to SPL Peak (5% Dist.) 135 dB
- Temperature range -25 to +100 °C
A new dust- and heat-resistant IEPE microphone for sound measurements in very hot environments.
The housing of the microphone is made entirely of stainless steel; the sound inlet features a stainless steel mesh that repels dust particles and water.
The internal electronics and microphone capsule are heat-resistant up to temperatures exceeding 302°F – 150°C and meet Class 1 tolerance limits (WS3F and IEC 61672).
The SWHT series microphones are equipped with a BNC connector, allowing the use of standard BNC-to-BNC cables.
This 1/4-inch measurement microphone can be calibrated using the 4010 or CA111 sound calibrators, as well as other suitable sound pressure calibrators.
The MI microphone series features a compact housing and is designed for extreme operating conditions.
Class 1 free-field | in accordance with IEC 61672 |
|---|---|
Transducer type | Capacitive pressure transducer |
Diameter | 1/4″ |
Polar pattern | Omni |
Frequency range | 20 Hz – 20 kHz |
Sensitivity @ 1 kHz | 12 mV/Pa |
Max. SPL for 1% THD at 1 kHz | 146 dB Peak |
Inherent noise | 39 dB(A) |
Output impedance | <50 Ohm |
Current consumption | 2-20 mA |
Power supply | 18 V DC to 30 V DC |
Bias: | 12.5 Volt |
Temperature range, operation | -20°C to +180°C |
Heat resistant | up to 180 °C |
Diameter | 7 mm ± 0.05 mm |
Length | 84 mm 1/4″ sleeve diameter over the entire length |
Weight | 18.6 g |
Connector | BNC (fem.) |
The MP30-Blast 1/2″ measurement microphone is designed for use with explosions or gas deflagrations. For precise measurement of pressure waves below 2 Hz, the optional MKS 222 E infrasound microphone capsule is available.
Typical applications include measuring blasts in mines and other acoustic events involving high sound pressure levels. Electrical connection is made via the permanently integrated BNC connector using standard BNC cables.
The MI-MKPL microphone holder is recommended for mounting the microphone. Accessories for 1/2″ measurement microphone capsules—such as windscreens or the MR40 rain protection set for continuous outdoor monitoring—can be used.
The measurement microphone can be calibrated using the 4010 sound calibrator (preferred) or other suitable sound pressure calibrators.
MP30-Blast
½” High SPL Microphone
- Class 1 and WS2F according to IEC 61094-4
- Sensitivity 12mV/Pa
- IEPE constant current supply 2-20 mA | Bias: 12.5 Volt
- Polar Pattern: Omnidirectional
- Frequency Response: 1.5 Hz – 20 kHz
- Measuring range 34 dB (to SPL Peak (3% Dist.) 150 dB
Scope of delivery:
- ½” microphone capsule pre-polarized
- ½” IEPE microphone preamplifier
- WS-RG-80 1/2″ microphone wind screen Ø 80 mm
In this presentation, I will show you how to measure hum and infrasound using a calibrated USB measurement microphone.
Data analysis is performed using the open-source software SCILab.
The script, user manual, and report template are provided free of charge by engineer Edwin Krasser.
The first class 1 WS2F-compliant infrasonic measurement microphone with USB interface on the market.
It is equipped with a pre-polarized 1/2” microphone capsule that has been specially developed for low-frequency applications and works in a linear range from 1 Hz to 20 kHz.
The iSV1611 USB microphone preamplifier is able to perform measurements in two different level ranges simultaneously.
The measurement of infrasound is possible with very low ambient noise from a level of 15 dBA.
The USB microphone preamplifier is designed for three different sampling rates: 48 kHz, 96 kHz and 192 kHz.
This allows the iSV1611 digital preamplifier to be combined with other microphone capsules, e.g. for ultrasound or high-level measurements.
The MI15-HLSW-TNC microphone is specially designed for harsh industrial environments.
Its robust stainless steel housing with a stainless steel mesh at the sound inlet offers excellent protection against electromagnetic interference, particles and splashing water.
It is suitable for high sound pressure levels of up to 160 dB, such as those that occur during explosions, arc flashes and gunshots.
The MI15 microphone has a short overall length of 65.5 mm and a TNC connector.
The power supply is provided by an IEPE constant current source 4mA.
The MI15 microphone can be calibrated with a microphone calibrator at 114 dB SPL and a 1/4″ adapter.
MI15 Identify Defects During Welding
Sonibel Instruments Explanatory Demo with CPO
Sonibel catches weld defects during welding, giving welders the option to rework them on the spot and minimize repair costs.
- Fewer Inspection Bottlenecks Pass inspections the first time and keep projects moving forward.
- Reduced Rework Time Address defects immediately rather than waiting for NDT.
- Less Downstream Delays Minimize the cascading effects of failed inspections on your project timeline.
1/4″ microphone
100 mV/Pa
Class 1 – IEC 61672
Free Field
20 Hz to 30 kHz
22 dBA to 127 dB
1/4″ microphone
0.35 mV/Pa
Class 1 – IEC 61672
Free Field
20 Hz to 30 kHz
54 dBA to 179 dB
1/4″ microphone
3 mV/Pa
WS3F acc to IEC 61094-4
Free field
5Hz to 100 kHz
35 dBA to 168dB
1/2″ microphone
50 mV/Pa
Class 1 – IEC 61094-4
Free Field
0.5 Hz to 20 kHz
16 dBA to 135 dB
Transducer type | Capacitive pressure transducer |
|---|---|
Frequency range of the free field response | ±2 dB 2.5 Hz to 16 kHz ±3 dB 2.0 Hz to 20 kHz |
Sensitivity | 320 mV/Pa |
Sensitivity re 1 V/Pa | -10 dB ± 2.5 dB |
Max. SPL for 3% THD at 1 kHz | Peak, 20 Hz to 5 kHz 116 dB Peak, 20 Hz to 20 kHz 104 dB RMS, 20 Hz to 5 kHz 113 dB RMS, 20 Hz to 20 kHz 101 dB |
Inherent noise | 6.5 dBA |
Output impedance | <100 Ohm |
Current consumption | 4 mA to 20 mA |
Power supply voltage | 24 V DC to 30 V DC |
Temperature range, operation | -20 °C bis +60 °C |
Temperature range, storage | -40 °C to +80 °C |
Temperature coefficient at 250 Hz | ≤0.01 dB/K |
Static pressure coefficient at 250 Hz | -0.00001 dB/Pa |
Temperature limits | -50 °C to +100 °C |
Humidity limits | r.H. <100%, absence of condensation |
Diameter | without protection grid 12.7 mm ± 0.05 mm with protection grid 13.2 mm ± 0.05 mm |
Length | 135 mm |
Weight | 250 g |
Plug | BNC |
Microphone identification memory | 256-Bit 1-WireTM EEPROM (DS 2430 AP) |
1/2″ USB microphone
WS2F according to IEC 61094-4
Free Field
4 Hz to 20 kHz
16 dBA to 140 dB
pre-polarized
1/2″ USB microphone
WS2F according to IEC 61094-4
Free Field
1 Hz to 20 kHz
15 dBA to 140 dB
pre-polarized
1/4″ USB microphone
WS3F according to IEC 61094-4
Free field
5 Hz to 75 kHz
35 dBA to 158 dB
pre-polarized
Model | 1/4″ IEPE Microphone Sytems Class 1 with Preamplifier | Price |
|---|---|---|
POM-MI1921 | MI19 and MI21 microphone sleeve adapter from 1/4″ inner diameter to 1/2″ outer diameter. POM material to ensure galvanic isolation to prevent ground and earth loops | 24 € |
POM-MI17RG50 | MI17 and RG-50 microphone sleeve adapter to 1/2″ outer diameter. POM material to ensure galvanic isolation to prevent ground and ground loops | 24 € |
MicCAL | Microphone Calibration Fee for ROGA Instruments microphones MI15 | MI17 | MI18 | MI19 | MI21| RG-50 | RG-50HL| MP30| MP40 After successful factory calibration, the microphone is returned to the customer with our factory calibration certificate. | 210 € |
MicREP | Microphone Repair Fee for ROGA Instruments microphones MI15 | MI17 | MI18 | MI19 | MI21| RG-50 After successful repair and factory calibration, the microphone is returned to the customer with our factory calibration certificate. | 225 € |
WS-RG-40 | 1/4″ microphone windscreen Ø 40 mm | 38 € |
MI15-HLSW-TNC | Robust Industrial Microphone – 160 dB High Sound Pressure Level – IP55 Overall Length: 65 mm Sensitivity: 1 mV/Pa Constant Current Supply: 2–20 mA TNC Connector Polarity: Omnidirectional Frequency Response: Class 1 IEC 61672-1 20 Hz – 30 kHz Factory Calibration Certificate Included with Sensitivity & Frequency Response Data Measurement Range: 46 dB(A) to SPL Max 160 dB HS Code 90318080 | 830 € |
MI19 | ¼” IEPE microphone for industrial applications Sensitivity 50 mV/Pa Constant current supply 2 – 20 mA BNC connector Polar pattern: omnidirectional Class 1 frequency response in accordance with IEC 61672 20 Hz – 30 kHz calibration sheet included Sensitivity & Frequency Response Inherent noise 30 dBA SPL Max 130 dB HS Code 90318080 | 490 € |
MI19SW | IP55 splash water resistant ¼” IEPE microphone for industrial applications Sensitivity 50 mV/Pa Constant current supply 2-8 mA BNC connector Polar pattern: omnidirectional Class 1 frequency response in accordance with IEC 61672 20 Hz – 30 kHz calibration sheet included Sensitivity & Frequency Response Inherent noise 30 dBA SPL Max 130 dB HS Code 90318080 | 535 € |
MI19-HS | High Sensitivity ¼” IEPE microphone for industrial applications Sensitivity 100 mV/Pa Constant current supply 2-8 mA BNC connector Polar pattern: omnidirectional Class 1 frequency response in accordance with IEC 61672 20 Hz – 30 kHz calibration sheet included Sensitivity & Frequency Response Inherent noise 22 dBA SPL Max 130 dBPeak HS Code 90318080 | 595 € |
MI19-HSSW | IP55 Splash Water Proof – High Sensitivity ¼” IEPE microphone for industrial applications Sensitivity 100 mV/Pa Constant current supply 2-8 mA BNC connector Polar pattern: omnidirectional Class 1 frequency response in accordance with IEC 61672 20 Hz – 30 kHz calibration sheet included Sensitivity & Frequency Response Inherent noise 22 dBA SPL Max 130 dBPeak HS Code 90318080 | 725 € |
MI19-HL | High Sound Pressure Level Microphone SPL Max. 179 dB(C) Peak ¼” IEPE microphone for industrial applications Sensitivity 0.35 mV/Pa Constant current supply 2-8 mA BNC connector Polar pattern: omnidirectional Class 1 frequency response in accordance with IEC 61672 20 Hz – 30 kHz calibration sheet included Sensitivity & Frequency Response Inherent noise 54 dBA SPL Max 179 dBCPeak HS Code 90318080 | 980 € |
MP30-HSPL-342 | High Sound Pressure Level Microphone SPL Max. 186 dB(C) Peak 1/4″ microphone with constant pressure frequency response WS3P according to IEC 61094-4 Pressure 3.5Hz to 70kHz 60dB(A) to 186dB pre-polarized HS Code 90318080 | 2105 € |
MP30-Ultra | Ultrasound Microphone 5 Hz to 100 kHz 1/4″ microphone with constant pressure frequency response WS3F according to IEC 61094-4 Free Field 5Hz to 100kHz 35dB(A) to 168dB pre-polarized HS Code 90318080 | 1995 € |
MI21 | ¼” IEPE condenser microphone Splash Water Proof IP55 Sensitivity 50 mV/Pa / ± 1.0 dB CCP IEPE supply 2-6 mA BNC connector Polar pattern: omnidirectional Frequency response IEC 61094-5 20 Hz – 4 kHz: ± 0.5 dB 4 kHz – 20 kHz: ± 1.5 dB corresponds to class 1 Calibration sheet included Sensitivity & Frequency Response Inherent noise 26 dB(A) SPL Max 130 dB HS Code 90318080 | 650 € |
MI17 | 1/4″ IEPE microphone, Sensitivity 50 mV/Pa, constant current supply 2-8 mA BNC connection Class 1 frequency response in accordance with IEC 61672 20 Hz – 30 kHz free field including individual Calibration sheet (sensitivity & frequency response) Inherent Noise 30 dB (A) HS Code 90318080 | 625 €
|
MI17SW | 1/4″ IEPE microphone Splash Water Proof IP55 Sensitivity 50 mV/Pa, constant current supply 2-8 mA BNC connection Frequency response: 20 Hz – 30 kHz: free field Class 1 frequency response in accordance with IEC 61672 including individual Calibration sheet (sensitivity & frequency response) Inherent Noise 30 dB (A) HS Code 90318080 | 675 €
|
RG-50 | 1/4″ IEPE free field microphone Sensitivity 50 mV/Pa constant current supply 2- 20mA BNC connection Frequency response 5 Hz – 4 kHz: ± 0.5 dB 4 kHz – 30 kHz: ± 1.5 dB free field, corresponds to class 1 IEC 61094-5 including individual Calibration sheet (sensitivity & frequency response) Inherent Noise 26 dB (A) HS Code 90318080 | 670 € |
RG-50SW | 1/4″ IEPE Free-field microphone Sensitivity 50 mV / Pa constant current supply 2- 20mA BNC connection Splash Water Proof IP55 Frequency response 5 Hz – 4 kHz: ± 0.5 dB 4 kHz – 30 kHz: ± 1.5 dB free field, corresponds to class 1 IEC 61094-5 including individual Calibration sheet (sensitivity & frequency response) Inherent Noise 26 dB (A) HS Code 90318080 | 700 € |
RG-50HL | High Sound Pressure Level Microphone SPL Max. 150 dB(C) Peak High SPL Microphone e.g. shooting noise WS3F Free-field IEC 61094-5 Total length: 95 mm Sensitivity 14 mV/Pa constant current Supply 2-20 mA BNC connection Polar pattern: omnidirectional Frequency response: 5 Hz – 4 kHz: ± 1 dB 4 kHz – 30 kHz: ± 1.5 dB factory calibration certificate included measuring range up to SPL 144 dBRMS / 150 dB peak HS Code 90318080 | 880 € |
RG-50HLSW | High Sound Pressure Level Microphone SPL Max. 150 dB(C) Peak Splash Water Proof IP55 High SPL Microphone e.g. shooting noise WS3F Free-field IEC 61094-5 Total length: 95 mm Sensitivity 14 mV/Pa constant current Supply 2-20 mA BNC connection Polar pattern: omnidirectional Frequency response: 5 Hz – 4 kHz: ± 1 dB 4 kHz – 30 kHz: ± 1.5 dB factory calibration certificate included measuring range up to SPL 144 dBRMS / 150 dB peak HS Code 90318080 | 930 € |
MM310 | Ultra Sound Microphone SPL Max. 158 dB Peak High SPL Microphone e.g. shooting noise WS3F Free-field IEC 61094-5 Total length: 58 mm Sensitivity 3.5 mV/Pa constant current Supply 2-20 mA BNC connection Polar pattern: omnidirectional Frequency response: 20 Hz – 100 kHz: factory calibration certificate included HS Code 90318080 | 1360 € |
Model | 1/2″ IEPE Microphone Sytems Class 1 WS2F & WS2D | Price |
|---|---|---|
MicCAL | Microphone Calibration Fee for all ROGA Instruments microphones. After successful factory calibration, the microphone is returned to the customer with our factory calibration certificate. | 210 € |
WS-RG-80 | 1/2″ measurement microphone wind screen Ø 80 mm diameter | 38 € |
MP30 | MP30 Microphone Set Prepolarised Microphone Capsule with Microphone Preamplifier 1/2″ IEPE Free-field microphone Sensitivity 40 mV/Pa constant current supply 2- 20mA BNC connection Polar pattern: omnidirectional Frequency response 4 Hz ~ 10 Hz ± 1.5 dB 10 Hz – 4 kHz: ± 0.5 dB 4 kHz – 20 kHz: ± 2.5 dB free field, corresponds to class 1 including individual Calibration sheet (sensitivity & frequency response) Measuring Range: 16 dB(A) to 135 dB HS Code 90318080 | 1170 € |
MP30-50 | MP30 Microphone Set Prepolarised Microphone Capsule with Microphone Preamplifier 1/2″ IEPE Free-field microphone Sensitivity 50 mV/Pa constant current supply 2- 20mA BNC connection Polar pattern: omnidirectional Frequency response 4 Hz ~ 10 Hz ± 1.5 dB 10 Hz – 4 kHz: ± 0.5 dB 4 kHz – 20 kHz: ± 2.5 dB free field, corresponds to class 1 including individual Calibration sheet (sensitivity & frequency response) Measuring Range: 16 dB(A) to 135 dB HS Code 90318080 | 1210 € |
MP30-Blast | MP30-Blast Microphone Set Prepolarised Microphone Capsule with Microphone Preamplifier 1/2″ IEPE difussefield microphone Sensitivity 12 mV/Pa constant current supply 2- 20mA BNC connection Polar pattern: omnidirectional Frequency response 1.5 Hz – 20 kHz: ± 2 dB including individual Calibration sheet (sensitivity & frequency response) Measuring Range: 34 dB to 150 dB HS Code 90318080 | 1380 € |
MP30-Infra | 1/2″ microphone for infrasonic low frequency applications WS2F according to IEC 61094-4 Free field 0.5 Hz to 20 kHz 15 dBA to 135 dB pre-polarized 1/2″ microphone preamplifier MP30 included HS Code 90318080 | 1720 € |
MP40
| MP40 Set 1/2 ” condenser microphone WS2F (DIN IEC 61094-4) Frequency range: 1.5 Hz – 3.5 Hz: ± 1.5 dB 3.5 Hz – 4 kHz: ± 0.5 dB 4 kHz – 20 kHz: ± 1.5 dB Free-field Including preamplifier PA-01 Dynamic range 16 dB(A) -135dB IEPE Constant Current powered Sensitivity: 50 mV / Pa Download MP-40 PDF 90318080 | 1236 € |
MM210 | 1/2″ microphone for general applications WS2F according to IEC 61094-4 Free field 50 mV/Pa 3.5 Hz to 20 kHz 15 dBA to 146 dB pre-polarized 1/2″ microphone preamplifier MV210 included HS Code 90318080 | 1480 € |
MMS 214 | Low noise microphone MMS 214 has a particularly low inherent noise level and is designed for acoustic measurements of low sound pressure levels close to the threshold of human hearing HS Code 90318080 | 2950 € |
Model | Outdoor Measurement Microphone – Outdoor Microphone | Price |
|---|---|---|
MR10 | MR10 is a weatherproof microphone unit consisting of a 1/4″ IEPE measurement microphone MI19SW and the rain protection unit for outdoor use. HS Code 90318080 | 635 € |
MP30-R-Blast SET | Weatherproof High SPL Blast Microphone Measurement Range: 35 dB to 150 dBPeak Frequency response: 1.5 Hz to 20 kHz The sound entrance at a 90º angle to the microphone axis is ideal for monitoring ambient and traffic noise. MP30-R is a 1/2-inch pre-polarized condenser outdoor microphone. It is suitable for continuous use in rainy days or in a very high or very low temperature environment. MP30-R uses a WS2F and IEC 61672 Class 1 MP30 microphone, which is characterized by its stability. It is the best choice for long-term outdoor use, such as noise monitoring. HS Code 90318080 | 2375 € |
MP30-R SET | Weatherproof 1/2″ IEPE Microphone The sound entrance at a 90º angle to the microphone axis is ideal for monitoring ambient and traffic noise. MP30-R is a 1/2-inch pre-polarized condenser outdoor microphone. It is suitable for continuous use in rainy days or in a very high or very low temperature environment. MP30-R uses a WS2F and IEC 61672 Class 1 MP30 microphone, which is characterized by its stability. It is the best choice for long-term outdoor use, such as noise monitoring. HS Code 90318080 | 2175 € |
iSV1611-R | Weatherproof 1/2″ USB Microphone The sound entrance at a 90º angle to the microphone axis is ideal for monitoring ambient and traffic noise. The iSV1611-R USB microphone is equipped with the MR40 microphone rain cover. Reference direction of sound incidence 90° to the microphone axis. HS Code 90318080 | 2175 € |
Model | USB Measurement Microphone – Class 1 Sytems | Price |
|---|---|---|
iSV1611 | 1/2″ USB microphone WS2F according to IEC 61094-4 Free Field 4 Hz to 20 kHz 16 dBA to 140 dB | 925 € |
iSV1611-R | 1/2″Weatherproof USB Microphone WS2F according to IEC 61094-4 Free Field 4 Hz to 20 kHz 16 dBA to 140 dB | 2175 € |
iSV1611-167 | 1/4″ USB microphone WS3P according to IEC 61094-4 Pressure field 3.5 Hz to 70 kHz 57 dBA to 167 dBA | 1765 € |
iSV1611-Infra | 1/2″ USB microphone WS2F according to IEC 61094-4 Free Field 1 Hz to 20 kHz 15 dBA to 140 dB | 1775 € |
iSV1611-Ultra | 1/4″ USB microphone WS3F according to IEC 61094-4 Free field 5 Hz to 75 kHz 35 dBA to 158 dB | 1765 € |
iSV1611-342 | 1/4″ High SPL USB microphone 1/4″ microphone WS3P acc to IEC 61094-4 Pressure 3.5Hz to 80 kHz 60dBA to 186dB | 2085 € |
Measuring range, sound pressure level and microphone sensitivity.
A typical 1/2″ measurement microphone delivers a voltage of 50 mV at 1 Pascal. 1 Pascal corresponds to a sound pressure level of 94 dB. 94 dB is already very unpleasant for humans and is only tolerated in rare situations.
During a normal conversation, the sound pressure level is below 74 dB, i.e., 20 dB lower. 20 dB quieter is a factor of 10 quieter.
This means that at 74 dB, the microphone only delivers 5 mV.
Assuming that end-of-line testing involves acoustically testing parts in a soundproof test chamber, it can be assumed that the measurement microphone delivers only a few microvolts.
The choice of the input measurement range for the measurement data acquisition is therefore crucial. Assuming that the measurement card has a measurement range of 10,000 mV and the measurement microphone is exposed to a sound pressure level of 74 dB, which delivers 5 mV, the 10,000 mV measurement range is significantly too coarse for this application.
The difference becomes even more apparent when you consider that verbal interaction is reduced in the office. At a sound pressure level of 54 dB, the voltage detected by the measurement microphone is 0.5 mV.
The comparison scenario with a scale with a 10,000 kg measurement range illustrates that weighing a 0.5 kg object is associated with a high degree of inaccuracy.
Our solution for this application is the PnDL-100 with an input measurement range of 100 mV, which delivers an acoustic measurement range of 13 to 97 dB(A).
