Because of their background in both music and science, all members of Kahle Acoustics are particularly attuned to the demands and language of musicians, and the requirements of both the audience and the performers on stage. For big projects outside Europe, Kahle Acoustics frequently collaborates with local consultants in order to more closely supervise construction, and provides a hands-on approach to implementing the acoustic solution.

Education Born in 1967 in the vicinity of Gouda in The Netherlands, Cees Mulder studied electronics at the Hogeschool Utrecht (University of Applied Science Utrecht) where he obtained a bachelor degree in 1991. After graduation he attended post-graduate courses on Sound Balance at the Royal Conservatory at The Hague, on Acoustics and Electro Magnetic Compatibility in Antwerp.
In addition to his technical education, Cees has been active in theatres mixing sound at performances for music and speech and he makes professional recordings. Although not playing an instrument professionally, he regularly makes music with friends.
Professional Experience Cees' first collaboration with Kahle Acoustics was in spring 2010 — with and under the supervision of Eckhard Kahle — in two theatres in Toulouse, France, where the acoustics needed to be improved with a reverberation amplification system in order to make the theatres suitable for opera productions. Following this experience, Cees joined Kahle Acoustics as a collaborative consultant.
From 1994 to 2000, Cees worked as an acoustician at the Philips projects division, where he was involved in a large number of international projects, specializing in reverberation amplification systems, a method for creating variable acoustics using electro acoustic means, with support from his mentor Stefan de Koning, one of the inventors of the Philips MCR system at the Philips Research Labs. Furthermore, Cees worked as an electronic engineer at D&R elektronica (mixing consoles) and as an acoustician at Peutz consultants and LBP consultants.
Since 2006 Cees has been working as an independent consultant. His projects include the Capitol Gent, Belgium, where he conducted an acoustic investigation of the hall and designed improvements to the orchestra pit; the Kursaal Oostende, Belgium, and the Oranjerie at Vanenburg Estate at Putten, The Netherlands, where he was responsible for the room and variable acoustics of the main halls; the City Theatre Gouda, where he was responsible for improving the room acoustics during the renovation. Cees is acoustic consultant for the concerts at the Hoflaanchurch at Rotterdam-Kralingen, The Netherlands. Furthermore Cees was involved in the design and tuning of systems for variable acoustics at Sala Palatului Bucharest, for the Enescu Festival in Romania, at the Congress Union Celle in Germany, at the City Theatre Almere in The Netherlands, at the Cultural Centre Hasselt in Belgium, at the Tonhalle Düsseldorf in Germany, at the Auditorium Maurice Ravel Lyon in France and at the Congress Centre Messe Frankfurt in Germany. He has also been active in many public address and sound reinforcement projects like airports, parliaments, congress and multi-functional halls, mosques and other large public spaces such as the Pyramide du Louvre.
Cees is an active member of the Dutch Society for Stage Engineering (VPT), notably contributing to the workgroups Theatre Buildings and Sound Design. Cees teaches acoustics and audio electronics at the Theatre Academy Amsterdam.
Langage Skills Cees' native tongue is Dutch and he is fluent in English and German.