Excerpt from a review of the Tchang Acoustic Resonators by 6 Moons in 2007. Apologies if I posted this previously.
"The resonators also become focal points for intense overtone radiation. That is denser at their points of origin than in the surrounding air. As directional organs, our ears key into these radiation sources and our acoustic perception of the space we're in is altered. Again, no music needs to be played to sense this spatial overlay. Speech will do, or the sound of our own foot fall. Being completely passive, the resonators can only be activated by received energy. As HF modulators, a full-range input obviously isn't needed. Franck Tchang has used a spectrum analyzer to corroborate this action up to 3GHz. By affecting the ordinary acoustic damping through adding parallel values from the resonators, original HF content reappears. It becomes audible again and rebalanced against the LF energies. Treble decays improve and the subjective impression of audible space deepens. The resonators equalize air pressure differentials and can be installed in a fridge, mailbox or outside a room. Distance will not affect their efficaciousness. That's quite a fatal blow to common sense but there it is according to the maestro. Franck has treated recording studios, performance venues, bars, living spaces and entire buildings. His demand as an expert tuning maestro is growing. That brings to mind Combak Corp.'s Kiuchi-San who enjoys a similar reputation in Japan."
"The resonators also become focal points for intense overtone radiation. That is denser at their points of origin than in the surrounding air. As directional organs, our ears key into these radiation sources and our acoustic perception of the space we're in is altered. Again, no music needs to be played to sense this spatial overlay. Speech will do, or the sound of our own foot fall. Being completely passive, the resonators can only be activated by received energy. As HF modulators, a full-range input obviously isn't needed. Franck Tchang has used a spectrum analyzer to corroborate this action up to 3GHz. By affecting the ordinary acoustic damping through adding parallel values from the resonators, original HF content reappears. It becomes audible again and rebalanced against the LF energies. Treble decays improve and the subjective impression of audible space deepens. The resonators equalize air pressure differentials and can be installed in a fridge, mailbox or outside a room. Distance will not affect their efficaciousness. That's quite a fatal blow to common sense but there it is according to the maestro. Franck has treated recording studios, performance venues, bars, living spaces and entire buildings. His demand as an expert tuning maestro is growing. That brings to mind Combak Corp.'s Kiuchi-San who enjoys a similar reputation in Japan."