Figure 9.

Experimental verification of theoretical f-hole conductance. Theoretical boundary element method predictions (diamonds) and experimental measurements (circles) of air-resonance frequency show excellent agreement (RMSE ≈ 1%). A receiver is placed inside an instrument with rigidly clamped walls. An acoustical source is placed outside the instrument. Expected V ^−0.5 dependence of the air resonance frequency for a rigid instrument is observed. The conductance of the two interacting violin f-holes is determined from equation (2.3) in theoretical predictions. The air-resonance frequency is taken to be the average of the half-power frequencies measured on either side of the air-resonance peak and is found to have insignificant variation of less than 1% across multiple measurements.