MTG at the ICSV29 - The 29th International Congress on Sound and Vibration in Prague

MTG at the 29th International Congress onSound and Vibration (ICSV29) from 9 to 13 July 2023 at the Hilton Prague hotel

The International Institute of Acoustics and Vibration (IIAV) and the Society ofAcoustics (Czech Republic) organized the 29th International Congress on Soundand Vibration (ICSV29) from 9 to 13 July 2023 at the Hilton Prague hotel in the Czech Republic for scientists, engineers, and academics working in the areas of sound and vibration.
This year, there was a total of 727 abstracts submittedf rom 45 countries. The Scientific Programme was structured into 14 Themes, each containing Structured Sessions and Regular Sessions.

For the international acoustic-and vibration experts the ISCV29 included an extensive exhibition of sound and vibration measurement instrumentation, equipment as well as noise and vibration control technologies.

Together with its long-standing partner Sinus Messtechnik GmbH, MTG actively participated as exhibitorat the extensive international Congress exhibition of noise and vibration control technologies.
MTG and Sinus presented a wide range of high-end sound and vibration measuring instruments to the international trade audience, such as measurement microphones for indoor and outdoor use, digital measurement preamplifiers, acoustic calibrators, sound intensity probes.
Special attention was paid to the new WME 980 weatherproof microphone units for outdoor continuous sound measurement for stationary and mobile noise monitoring as well as ambient and traffic noise analysis as adigital version with the MV 240 digital 1/2" measurement microphone preamplifier and USB interface.
The developent of a digital version of the WME 980 AM was carriedout in response to important user impulses and allows an individual expansion of the functionality and the range of applications, especially in aircraftnoise measurement.

WME 980 AM as digital variant with USB interface:

•sound incidence vertical to the microphone axis
• 20 Hz to 20 kHz
•15 dBA to 149 dB
•LEMO® ERD.2S.306
•Power supply: 6 V DC to 25 V DC
•remote calibration with electrostatic actuator

The special feature of the digital version is the combination with the 1/2" measuring microphone preamplifier MV 240 digital with USB interface.

The WME 980 AM is a weatherproof microphone unit for permanent outdoor measurement as well as stationary or mobile airport noise monitoring.

The housingis made of stainless steel and is equipped with a bird spike, windscreen and rain shield. Inside the housing are easily exchangeable dehumidifier bags with silica gel.
An easily exchangeable dehumidifier adapter with a humidity indicator window is part of the measurement microphone.

The microphone unit has a pole adapter with a G 1.5“ thread for installation. A tripod adapter or G 1“ thread adapter can be screwed directly to the pole adapter. The output connector is located well-protected at the lower end of the housing under the pole adapter.

The WME 980 AM can be calibrated with standard 1/2“ sound calibrators. For remote calibration, a remotely switchable, built-in calibration generator feeds a 1 kHz calibration signal into the measurement microphone via an electrostatic actuator. Inside the housing there are switches for the cable driver and the microphone heater, which prevents condensation under extreme climatic conditions.

The WME 980 AM is suitable for sound level meters of Type 1 acc. IEC 61672.

1/2" measuring microphone preamplifier MV 240 digital - the outstanding features and benefits at a glance:

- Digital measuringmicrophone with 32-bit data transmission
- Digital transmission of fixed calibrated sound pressure values
- Full dynamics of a newly developed low noise 1/2" capsule
- with "¼" capsule - maximum 160 dB sound pressure level
- max. dynamic range of the 32 bit range is 186 dB
- Only one measuring range for the entire dynamic range, i.e. no range switching necessary
- direct digital sound pressure conversion (with exact sensor-ADC adjustment to exclude common sources of error)
- Sampling frequency up to 192kHz is supported
- no measurable or audible USB artifacts, USB class compatible (USB 2/3)
- no additional hardware driver necessary and user independence from special Firmware,
possibility of using common measuring software and compatible with all common operating systems
- internally generated capsule polarization voltage 200V
- Minimal inherent noise due to optimum adaptation of the measuring capsule to the AD converter
- Electrical voltage in the system is irrelevant for users due to direct digital Sound Pressure Conversion (Direct Digital Sound Pressure Transformation-DDST)