바로크 플루트에 적용한 제트 제어형 아들러 윙의 음향학적 효과 = Acoustic Effects of a Jet-Control Adler Wing Applied to the Baroque Flute

다국어 초록 (Multilingual Abstract)

PURPOSE To test whether applying an Adler wing to an A=415 Hz Baroque flute improves timbre/clarity and pitch stability on cross-fingered notes (F4, G♯4, A♯4, B♭4, C5). We compare an embouchure-matched S-wing(non-uniform scaling) with a Lafin-size L, aiming for modern usability without losing historical identity. METHOD Artificial-blower tests standardized jet–edge conditions. For X (no wing), S, L across five notes, we recorded n=30 per condition(90 per note) at 24-bit/48 kHz(AKG C414, MOTU 828es). Spectra were analyzed with H1=0 dB. Primary metrics: high-band ΔL (H6–H8) and H2-H1. Secondary: overall ΔL, ΔL slope, H3-H1, Δcents (±20 cent). Stats: ANOVA/Welch, TOST, p<.05. RESULT (1) S met the “improvement confirmed” criteria (statistical significance+practical thresholds) by simultaneously increasing high-band ΔLand reinforcing H2-H1 in F4, G♯4, A♯4, and C5. (2) L showed “improvement confirmed” only for F4; for A♯4, B♭4, and C5 it often weakened even harmonics or reduced high-frequency contours. (3) For B♭4, S led in overall ΔL and tonal “center,” whereas X showed a more gradual ΔL slope, indicating better high-order persistence—thus yielding split conclusions depending on the target quality. (4) For all conditions, Δcents remained within ±20, confirming that observed changes arose from genuine spectral redistribution rather than pitch wander. CONCLUSION S reliably improves cross-fingered clarity and tonal center; L helps chiefly F4, and the reversible, non-destructive design preserves historical identity while adding modern acoustic gains.