Antiphon AB

  • Analysis of noise control solutions for electric drives in cars and identification of areas for product development.
  • Technical sales support
  • Market survey and support regarding methods for materials testing
  • Training of Antiphon personnel 

"Antiphon has much benefited from the support from Ulf, both as a teacher at internal acoustics training courses and when we need expert advice with technical customers support questions. His expertise and experience has been of great value at different consultations, both for our product development and for our laboratory work and is highly recommended", Berit Andersson, CEO Antiphon AB.

Swegon AB

  • Training of Swegon personnel
  • Support with calculation software for ducts and ventilation systems

Autoform i Malung AB

  • Developed and evaluated solutions for integrated sound reduction in Autoform products
  • Gave a general Acoustic and Vibration training for Autoform personnel


Consulting task: Leading and coordination of the management team, coordination of sales activities and technical development work, project and patent management, applications for grants, general planning and documentation.

Said about Dr. Orrenius

" Ulf is one of the most inspiring persons I've ever worked with. Cooperation with Ulf enhances your own performance and presents a good environment for new ideas and solutions."
  Martin Almgren, Head of Acoustics department at Tyréns 

"During many years in Aero- and Thermodynamics as a colleague at Bombardier Transportation, I have on several occasions worked with Ulf and got to know him on a personal level. In my experience Ulf is a very knowledgeable acoustician, inquisitive and open minded, with a strong personal drive to develop, improve and implement. You will be happy to have Ulf in your team or project.", 
  Mikael Sima, Founder CEO and Senior consultant at MSiCo AB