50Th anniversary of the first sound meter in the world in 2010 we celebrate the 50 anniversary of the model 2203, the father of all sound level meters. The sound meter is 50 years old in 2010 we celebrate the 50 anniversary of the model 2203, the father of all sound level meters. It was the first sound meter portable precision-based transistors in the world. It was manufactured for 21 years and had a few sales record of 17,300 units. If add their improved versions, models 2204 (Impulsiva time constant) and 2209 (peak detector), came to a total of 32,700 units.
This is the story of the first laptop in the world sound level meter, as was recorded in files and as they were told us who lived it. For half a century, product presentations were no more than a humildecomunicado on the news section of the factory on the last page of the Revistatecnica of Bruel & Kjar. Number 3 in 1960 included the Bulletin which is reproduced above. Don SLM our expert design of sound level meters for decades, Peter Hedegaard, gives us this explanation of how evolved the portable sound meter: the model 2203 was the first portable sound meter of Bruel & Kjar. I am not who to say who was the father of this special design, but it is likely that both P.V.
Bruel as GunnarRasmussen had something to see, but the final design is attributed to Kay Moller Petersen. What was special was that design the front in a cone shape, which made it possible to place the microphone in the housing without its acoustics would be affected significantly. Put another way: you could measure, hold and manage the sound level meter with one hand.A reissue of number 183, October 1970 Mobilia appeared as follows (translated from Danish): Bruel & Kjar was on the verge of developing a small manual sound level meter for use in factories, the traffic on the street and in other locations in which need to point to targets Mobile.