Sound waves can now carry multiple independent streams of data at once by vibrating in specific directions, mimicking how fiber optics use polarized light.
April 29, 2026
Original Paper
Vectorial Acoustic Multiplexed Holography
arXiv · 2604.24414
The Takeaway
Acoustic signals in air and water were always thought to be limited to simple pressure changes, which basically acts like a single channel. This new method uses the actual speed and direction of the particles to pack extra information into the same wave. By controlling the vector of these vibrations, engineers can create complex sound holograms or transmit separate data channels simultaneously. It transforms a simple sound pulse into a multidimensional information carrier. This could lead to underwater communication systems that are vastly faster and medical imaging that produces much sharper details.
From the abstract
Encoding more information into wave fields is a central goal in imaging, communication, and wave control. Optical holography benefits from polarization multiplexing, but acoustic holography remains largely limited to pressure-only encoding because sound in fluids lacks naturally independent vector channels. Here, we show that particle velocity can serve as a practical multiplexing degree of freedom despite the intrinsic pressure-velocity coupling governed by the acoustic Euler equation. We devel