The Wölfel Group has been Certified and Accredited as Follows

Wölfel Engineering GmbH + Co. KG

  • Certification according to DIN EN ISO 9001:2015 for the following scope: Consulting, design, analysis, measurement and development, manufacturing and sales of systems in strength of materials, dynamics and acoustics for mechanical, civil and plant engineering, Certificate Registration No: 04 100 020955
  • Accreditation according to DIN EN ISO/IEC 17025:2018 for testing in the fields: Determination of noise and vibrations, noise measurements at wind turbines, noise and vibrations at workplaces, aircraft noise, building acoustics, module immission control (DAkkS Registration-No. D-PL-19254-01-00)
  • In Bavaria and other federal states Wölfel has been officially acknowledged as measuring institution according to § 29b BImSchG (Federal Immission Control Act) for the determination of emissions and immissions caused by noise and vibrations. Confirmation of suitability for quality assurance [...] according to the standard KTA 1401.
  • Qualification for the system- and product-related quality assurance for the following scope: Consulting, Analysis and Design, Measurement in the fields of Strength of Material, Dynamics, Acoustics for Mechanical, Plant and Civil Engineering
  • Certification for the performance of quality inspections in the field of noise insulation according to DIN 4109, registration no. VMPA-SPG-210-04-BY in the directory of VMPA noise control test facilities published by VMPA (German Association of Material Testing Institutes)
  • Conformity for the measurement of sound emission values of wind turbines according to the Technical Guidelines, part 1, of Fördergesellschaft Windenergie (FGW)

Wölfel Wind Systems GmbH

  • Certification according to DIN EN ISO 9001:2015 for the following scope: Development, manufacturing and sales of products and systems for wind energy, Certificate Registration No: 04 100 020955-001

Experts of the Wölfel Group

Franziska Wruck is a member of the list of energy efficiency experts for support programs of the Federal Government (KfW) for:

  • Energy efficient building and renovation
  • Energy efficient renovation for monuments and other particularly worthy buildings

For this, she has successfully completed following training:

  • Effizienzhaus-Experte consulting, planning, implementation examined by TÜV Süd Akademie GmbH, Munich
  • Energy consultant for heritage buildings approved by Propstei Johannesberg GmbH, Fulda

Ms. Wruck is available for creating reports and calculations and working out your applications for the funding programs of the Federal Government.

Publicly appointed and sworn experts

Dr.-Ing. Markus Richter is a publicly appointed and sworn expert of Würzburg-Schweinfurt Chamber of Commerce for:

  • Structural dynamics (vibration protection, bell towers)
  • Machine dynamics (' polluter pays ' analysis, vibration isolation)

Dr. Richter is available for expertise in judicial and extrajudicial disputes, as well as for opinion in the context of proof backups.

Please contact us personally


We are at your disposal for expert opinions.

M. Sc. Franziska Wruck

+49 931 49708-440
Contact form

Dr.-Ing. Markus Richter

+49 931 49708-450
Contact form

Wölfel is Active in Standardization Committees

Wölfel's employees provide their specialized know-how to the general public by contributing to the development of national and international standards and guidelines. This is a selection of our activities:

  • KTA 2201.1, Design of Nuclear Power Plants against Seismic Events, Principles
  • KTA 2201.2, Design of Nuclear Power Plants against Seismic Events, Subsurface Materials (Soil and Rock)
  • KTA 2201.3, Design of Nuclear Power Plants against Seismic Events: Structural Components
  • KTA 2201.4, Design of Nuclear Power Plants against Seismic Events: Mechanical and Electrical Components
  • KTA 2201.5, Design of Nuclear Power Plants against Seismic Events: Seismic Instrumentation
  • KTA 2203, Protection of Nuclear Power Plants against Airplane Crash: Design of Structural Components

  • VDI 3842, Vibrations in piping systems
  • VDI 2038, Serviceablility of structures with dynamic impact
  • DIN 4178, Belltowers - analysis and realization
  • DIBT, Preliminary design principles for waste dump components
  • DIBT, Task force 'Analysis' of the Committee of Experts 'Plastic Vessels and Pipes'
  • DIN 4150, Vibration in buildings
  • VDI 3834, Measurement and evaluation of the mechanial vibrations of wind turbines and their components
  • Structural Health Monitoring and Assessment of wind turbines and offshore-platforms
  • DIN Standards Committee Building and Civil Engineering: NA 005-51-06 AA „ Earthquakes; Special issues (national mirror committee for CEN/TC 250/SC 8)“
  • CEN Standards Committee: CEN/TC 250/SC 8/WG 2 „Steel and Composite Structures“

  • NALS 001-03-07-01, Whole-body vibration
  • NA 001-03-07-02 UA, Hand-arm vibration
  • NALS 001-03-07-03, Seating and biodynamic modelling
  • ISO/TC 108/SC 3/WG 1, Human response to vibration — Measuring instrumentation
  • ISO/TC 108/SC 4/WG 15, Estimation of whole-body vibration health hazards

  • VDI 2065, Active Vibration Reduction

  • NALS A2 AK8 / DIN 45684-1, Acoustics - Determination of aircraft noise exposure on airfields
  • DIN 45687, Acoustics - Software products for the calculation of the sound propagation outdoors - Quality requirements and test conditions
  • NALS 001-03-09 AA, Measurement of vibration immissions
  • ISO/TC 43/SC 1/WG 56, Quality assurance of noise calculation methods implemented in software