Do flowers exhibit sound of any frequency? Lightning has a sound which we can't create artificially. We can create current which is inaudible. What should or can be done to make the violet colour audible?
There is a phenomenon called synesthesia: Some people hear sounds when watching colours, or seeing lights when hearing something. It is assumed that in these people the neural excitation of the optical center of the brain is also transmitted to the hearing center, or vice versa.
Otherwise there is no reason why a colour (→ frequence of an electromagnetic wave in the 600 THz range) should be associated with a sound (pressure wave 20–20000 Hz).
Of course, you can build a device that “translates” colours into sounds by connecting photo cells with and electronic sound generator.
Rumani Dey No, you cannot hear the sound of a visual thing such as a color. Color is experienced by the eyes by stimulating cone cells in the retina, whereas sound is perceived by the hearing by detecting pressure waves in the air.
Several flowering plants create noises, such as the rustling of leaves or the cracking of stems. These noises, however, are normally at very low frequencies and are not discernible to the human ear.
Thunder is produced by lightning as a result of the fast heating and cooling of the air near the lightning bolt. Thunder can be heard by people, but its frequency varies from 20 Hz to 20 kHz, which is within human hearing range.
It is not feasible to make the hue violet audible because colors and sound are separate types of inputs processed by various sensory organs in the body.