Sriram Subramanian demonstrated acoustic holography at the Royal Institution in London to levitate objects and create three-dimensional shapes using sound waves [1].

This technology represents a significant shift in engineering by allowing the manipulation of matter without any physical contact. By shaping sound fields, researchers can create tactile sensations and move materials in mid-air, potentially transforming fields from precision manufacturing to medicine.

During the Friday Evening Discourse on March 27, 2026 [1], Subramanian presented the capabilities of acoustic holography. The process relies on precisely computed sound fields that act as a physical framework for matter. This allows for the creation of complex 3D shapes that exist in the air, effectively using sound as a tool for structural design.

"What if sound could do more than travel through space — what if it could reshape it?" the Royal Institution said in a description of the event [1].

The demonstration highlighted the ability of these sound waves to generate physical sensations without a tangible surface. By controlling the pressure of the sound waves, the system can push and hold objects in specific coordinates. This level of control enables the levitation of small particles and the formation of invisible structures that can be felt by a human operator.

Subramanian used the event to explore the frontiers of modern engineering. The presentation showed how the intersection of computational physics and acoustics can lead to new ways of interacting with the physical world. The technology relies on the precise timing and phase of sound emitters to create the necessary interference patterns for levitation [1].

Because the system does not require physical grippers or containers, it offers a sterile way to handle sensitive materials. This capability is particularly useful for manipulating biological cells, or volatile chemicals, that could be contaminated by traditional tools.

“Sriram Subramanian demonstrated acoustic holography at the Royal Institution in London to levitate objects.”

Acoustic holography moves beyond simple levitation by allowing for the precise spatial arrangement of matter. By eliminating the need for physical contact, this engineering approach minimizes contamination and mechanical stress, providing a potential breakthrough for micro-assembly and non-invasive medical procedures.