All-Purpose Low Frequency Numerical Filter

Abstract

A real signal is a complex system with mixed components. In addition to needed components appear unusable components with different origin, namely noise. The clearance or the reduction of the unwanted components is realized on more ways, i.e. with analogical filter devices built-up on the signal capture or processing channel, or with numerical filters. This last way can be applied only on already digitized signal and it is necessary a high-speed calculator. The work presents an all-purpose numerical filter for low frequency domain, namely sound or mechanical vibration, with an excellent noise suppression or signal spectrum improvement.