Patent Review: Head-Related Transfer Function Equalization and Transducer Aiming of Stereo Dimensional Array (SDA) Loudspeakers

This patent, awarded to Polk Audio, describes a very specific loudspeaker design that claims to be able to achieve better stereo sound reproduction with “a realistic ambient field and a larger, and more stable acoustic image.” This obviously aims at achieving something that Polk Audio actually patented nearly 40 years ago, with its original Stereo Dimensional Array (SDA) loudspeaker, and for which the new updated patent now provides a new improved version. This article was originally published in Voice Coil, February 2019.

This article details the journey of British company Audioscenic, an innovative 3D audio beamforming technology company spun off from the University of Southampton. Marcos Simón shares how through a remarkable example of perseverance, Audioscenic realized its forward-thinking approach, from crosstalk cancellation systems to full 3D audio reproduction with speakers. In 2023, Audioscenic achieved its first commercial implementation to implement its unique 3D audio beamforming technology. This article was originally published in audioXpress, June 2023.

With the audio industry apparently determined to push forward the evolution towards spatial audio reproduction, manufacturers need tools to add the experience to their new product designs. Starting now, brands building on Audio Weaver can easily deploy THX Spatial Audio to bring immersive sound home entertainment devices to market. The partnership adds valuable new IP to DSP Concepts's library of 500 market-proven Audio Weaver modules.

Swedish digital audio processing pioneer Dirac and ASUS, the electronics powerhouse, have raised the bar on mobile audio with the new ASUS ROG Phone 5, which features a new level of sound fidelity for a smartphone with dual speakers, delivering a spatial soundscape and accurate stereo sound localization. The ASUS ROG Phone 5 now becomes the first smartphone to feature Dirac’s breakthrough MIMO mixed phase speaker co-optimization technology.

The Legend Series, the most advanced loudspeakers in Polk Audio’s history where undoubtedly one of the highlights at the 2019 Rocky Mountain Audio Fest (RMAF). The latest flagship speaker line from Polk Audio, the Legend Series represents the most sophisticated, and intensively engineered loudspeakers the company has ever introduced. The new Stereo Dimensional Array on the new L800 speakers was justifiably one of RMAF’s most popular demonstrations.