Based on a U.S. acoustic patent and through acoustic calculations of the headphone’s rotary sound channel, Synergie successfully developed a high-end headphone for a premium manufacturer in Dongguan. Featuring a unique dual-chamber acoustic design that is currently the only one of its kind worldwide, this solution eliminates over 99% of external noise and substantially reduces unwanted interference. It optimizes both deep bass and high treble performance, greatly enhancing the overall sound reproduction quality.