Method for influencing the device-typical sound emission of a cleaning device

A method for changing a sound spectrum of a sound emitted by a cleaning device,

• wherein the cleaning device comprises a cleaning mechanism for cleaning a surface, a detection device with a sensor for detecting the sound emitted during the cleaning activity, a computing device in the form of a processor for generating and analyzing the sound spectrum of the detected sound, a device housing with a flow channel, a section of the flow channel that can be displaced relative to the device housing, a motor-driven displacement device for displacing the displaceable section, a control unit in the form of a processor for controlling the displacement device, and a memory, in which a nominal amplitude of at least one sound frequency contained in the sound spectrum is stored,
• wherein the method comprises the following steps:
• carrying out with the cleaning device a cleaning activity on a surface to be cleaned,
• emitting device-typical sound by the cleaning device,
• detecting the emitted sound by means of the detection device,
• generating and analyzing the sound spectrum of the detected sound by means of the computing device, wherein the analysis includes, with respect to at least one sound frequency contained in the sound spectrum, a comparison of an actual amplitude of the detected sound frequency with a nominal amplitude of the sound frequency stored in a memory, and
• automatically controlling the displacement device with the control unit to displace the displaceable section in dependence on the analysis result until the actual amplitude of the detected sound frequency corresponds to the stored nominal amplitude of the sound frequency.