Ehrlund's Microphones

Göran Ehrlund is a Swedish innovator since the early 80's experiment with different types of microphones. The problem he had was that his recording studio was small, which created a major problem with recording sound leakage. He began to experiment with different kinds of contact microphones. The idea of the triangular shape came from nature.
If you throw a stone in water, it formes a circular wave pattern that paticipate slowly. The same happens in a circular microphone diaphragm. A square diaphragm creates instead a lot of different reflections in the edges that create disharmonics.
With the triangular membrane, this is not the case att all, nither a circular wave pattern nor corner reflectors.
A further advantage is that the triangular shape creates "multiple microphones in one" through since that the diaphragm in the corners of the triangle, behaving as a small diaphragm microphone while in the middle of the diaphragm, behaves like a large membrane.
Thus obtained the benefits of both worlds, both the speed and smoothness. Something that many sound engineers preferred onece they have tested the microphone.
Göran has also made a variant, optimized for radio broadcasters who are intensively used by, among other, Swedish Radio.
Something further unique about Görans microphones is that all development, manufacturing and assembly takes place in Sweden, by mostly small Swedish companies with Swedish made parts. In principle, almost all components are from companies placed in Dalecarlia, a region in the central part of Sweden.