The transparent wood-core rainstick is a quantum fusion of natural frequency and technological material! Natural wood core encased in acrylic creates a "wood-transparent" dual acoustic structure:
Wood harmonic library: Tree rings store 8-20Hz infrasound memories (growth vibrations), activating hippocampal primal safety (Case: Urban anxiety sufferers showed 35% HRV improvement).
Transparent sound guidance: Acrylic casing creates omnidirectional scattering, expanding diffusion range 200% vs. pure wood, forming a "spherical sound dome."
Wood-transparent resonance: Wood core (damping material) absorbs harsh highs, while casing amplifies 2-4KHz comfort band (Harvard Acoustics: closest to real rain spectrum).
