Systems, methods, and computer readable storage devices for controlling an appearance of a surface using sound waves

A method, comprising:

• emitting, by an ultrasonic source, one or more sound pulses towards a surface to obtain one or more reflected sound pulses which are used to determine one or more properties of the surface;
• receiving, by the ultrasonic source, one or more control signals, wherein the one or more control signals are based on the one or more properties of the surface that are determined;
• and
• emitting, by the ultrasonic source, one or more ultrasonic sound waves towards the surface based on the one or more control signals,
• wherein the one or more ultrasonic sound waves exert a force which causes visible particles to move to modify an opacity of the surface.

A non-transitory computer readable storage medium having executable computer-readable instructions stored thereon which, when executed by a processor cause the processor to perform operations comprising:

• emitting one or more sound pulses towards a surface to obtain one or more reflected sound pulses which are used to determine one or more properties of the surface;
• receiving one or more control signals, wherein the one or more control signals are based on the one or more properties of the surface that are determined;
• and
• emitting one or more ultrasonic sound waves towards the surface based on the one or more control signals,
• wherein the one or more ultrasonic sound waves exert a force which causes visible particles to move to modify an opacity of the surface.