Classes of Tonality of Signals in the Aspect of Active Elimination of Tonal Components
2019
scientific article
english
- tonality
- signal processing
- Active Noise Control
EN The aim of this paper is to analyse various types of signals defined as tonal where energy is concentrated in a narrow band of the spectrum. Not all tonal noises could be reduced using narrowband active noise control systems with cancelling signal generated based on source parameters. The author proposes the following classes of tonality: periodical (e.g. sinusoidal) signals, sinusoidal signals modulated by random function, sinusoidal signals with increased/decreasing amplitude and/or frequency, a combination of the two previous ones, and narrow band noises. For each type of the analysed signals active elimination of the tonal component using synthesized cancelling signal was carried out. Depending on the type of the signals different results were obtained which indicates the need to clarify the definition of a tonal signal, or use not one concept of atonal signal, but several classes discussed above.
2019126-1 - 2019126-8
CC BY (attribution alone)
public
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