Sonochromatism

[1] The phenomenon is created by the union between a brain and a colour-to-sound software or chip.

[2] The term was coined by Neil Harbisson to differentiate his experience of colour from people with chromesthesia or colour-to-sound synesthesia.

Their experience of colour is not involuntary, instead, it is caused by voluntary action such as a colour-to-sound chip implant or constant use of an eyeborg.

[5] Implantable colour-to-sound chips, software, mobile apps and cyborg antennas use Harbisson's Sonochromatic Scales as a standard transposition of colour frequencies to sound frequencies.

The scale includes infrareds and ultraviolets, discards colour as being part of a colour wheel and ignores musical/logarithmic perception so it can overstep the limits of human perception.