Obviously it is a big problem to filter diesel exhaust in a way that they are well tolerable for humans. And how is that in acoustics?
In our example of strongly disturbed language, we managed to filter as beautifully as when the morning fog clears and finally releases the blue sky.
The first picture shows the third octave analysis versus time of an unintelligible speech signal due to a strong distortion signal.
The second picture shows the same in the SOUNDTEC tool siVision. The constantly changing distortion tones (red lines) can easily be removed in this unique tool. The third picture shows the speech signal which can be understood very well now. It has the same dynamic range as the first picture (60 dB).
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