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vita / entstehungsgeschichte des ifa


The institute for applied acoustics was founded in 1985 in Dortmund/Germany by Emil Weiss.

Purpose of the institute, within research and development, was the examination of complex sound absorbing and receiving resonance systems, in particular musical instruments.
This intuition awoke in Weiss during years of being a musician, because he wouldn’t give in on the fact, that building a musical instrument not only finalizes its good but also its bad conditions for good. The focus points of this action were taken together and continuously worked out in the first project called “the resonance project” – the experience was taken to further plans.

While the "resonance project" primarily worked at the optimization of reflecting resonance systems, the second project, “the sonor project” examined and manipulated room-acoustics. In this project priorities were put to permanently take influence on the room acoustic without the help of electronic aid.

The so achieved knowledge and positive results obviously had to be taken on to common lawfulness. The results again were taken forward to a next project called “the low noise rail project”, a subject that normally wouldn’t be associated with sound as such.

  • During the examination of the sound radiating rail systems and the resulting noise development, it could be proofed, that a prophylactic manipulation of the involved materials (moving substance - non-moving substance) resulted in distinct reduction of the sound radiance. Due to different priorities and the monopolistic owner structure of all rail nets in Germany however, this could not be applied so far.
  • With “the quasimodo project”, the improvement of sound behaviour had priority as well, but this time not the reduction of sound radiation but the very opposite.
    A leading European bell foundry could be convinced by allowing a sound optimization experiment under the aspects of dissonance at one of their bells, a so called “bad cast”. All negative characteristics of the so far unsellable bell were eliminated.

The transition into the observation of biological systems is only a logical consequence. In “the antinnitus project” a pilot study proofed the human ear to be a system, which obeys same or at least similar laws like any other resonance system.

The as epidemic known “tinnitus” could be examined and then manipulated on a group of free volunteers that were found to be un-therapy able by school medicine, so that it could be eliminated in this order, what no other medical method had achieved so far.

The process is based on an individually adjusted series of sounding consonances, an individual composition of suitable sounds so to say, on which an existing tinnitus can react.
In “the auris project” lasting corrections of the actual hear ability are achieved in cases of partial deafness.
In 1995 the ifa moves from Dortmund to Heussenstamm near Frankfurt at Main, to team up with a doctoral thesis at the Frankfurt University, based on common studies of “the resonance project”

ifa does not permanently employ people, but with the help of modern communication systems, it is in contact with a network of specialists at all time, which on one side is very economical, and on the other side very effective. It takes advantage in all intentions.

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