Toothbrushes and audible signal generating components thereof

A method of operating a toothbrush to generate audio signals by toothbrushing motions, wherein the toothbrush comprises a drive mechanism and electronic circuitry configured to drive the drive mechanism to execute toothbrushing motions,

• wherein the electronic circuitry comprises a drive circuitry and a controller which is configured to form a drive signal to operate the drive circuitry to generate drive current,
• wherein the drive signal comprises a plurality of signal packets, wherein a signal packet has a signal packet duration and comprises a train of switching signals, wherein the switching signals are configured to repeatedly switch on and switch off drive current supply to the drive mechanism at a switching frequency fs, wherein the signal packet duration is configured to define a rhythm of toothbrushing motions;
• and
• wherein the method comprises a controller forming a train of switching signals by a train of audio data, the audio data being digitized samples of an audible signal and having a sample frequency;
• the controller sending the audio data at the sample frequency to form the train of switching signals having the sample frequency as a switching frequency to operate a drive circuitry to generate a plurality of pulsed drive current components to drive a motor to perform the toothbrushing motions by the toothbrush.