Batch-0027-007: Acoustic Impedance Matching in Japanese Noh Theatre Mask Resonance

批次0027-007：日本能剧面具中的声阻抗匹配与共振调控

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Noh masks are carved not for static expression but to function as acoustic impedance transformers between vocal tract and open-air performance space.
The hollowed cheek cavities and precisely tapered nasal passages tune fundamental frequencies to align with the 120–220 Hz resonance band of wooden stage floors.

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