Electro-acoustic control of radiation impedance for brass instrument timbre shaping: design of a vocalizing mute

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Table 5.

Comparison of the first five frequencies peaks F_k and amplitudes A_k of the first five peaks of the input impedance without control $Z_{in}^{\emptyset}$ $Z_{\mathrm {in}}^\emptyset$ and with control $Z_{in}^{c}$ $Z_{\mathrm {in}}^c$ .

k	1	2	3	4	5
$F_{k}^{\emptyset}$ $F^\emptyset _k$ [Hz]	109	173	237	288	351
$A_{k}^{\emptyset}$ $A_k^\emptyset$ [dB]	192	177	178	139	164

$F_{k}^{c}$ [Hz]	108	172	234	287	349
$A_{k}^{c}$ [dB]	183	159	170	145	163

$\frac{F_{k}^{c} - F_{k}^{\emptyset}}{F_{k}^{\emptyset}}$ $\frac {F^c_k-F^\emptyset _k}{F^\emptyset _k}$	−0.91%	−0.58%	−1.12%	−0.34%	−0.56%

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