Sound as aperiodic signal
A sound event without periodicity is a “sound". Oscilloscope graph as example of aperiodic sound signal.
Typical examples are the rustling of paper or the noise of road traffic.
Information and ideas:
Possible cross reference: Examination of aperiodic speech signals with the help of spectral analysis.
Further information on this graphic is available as information sheet on the media portal of the Siemens Stiftung.
Relevant for teaching:
Vibrations and waves