Acoustic spectrum – the acoustic spectrum is another term for the sound spectrum. It is the distribution of the intensity of individual components of sound, which depends on their frequency. Spectra can be generated using spectroscopy methods or can result from Fourier analysis, which breaks down the sound wave into its fundamental components. The acoustic spectrum is most often presented in the form of a graph and is a collection of tones with specific amplitude and frequency.
In the case of periodic waves, the frequencies of the sound components, whose intensity is different from zero, form a sequence of values. This distribution is referred to in acoustics as a discrete, linear, or line spectrum. For such a spectrum, Fourier series analysis can be applied.
In the case of non-periodic waveforms, we deal with a continuous spectrum, as it has continuous frequency ranges. In this case, the graph of such a spectrum takes the form of a continuous function.
