A soundboard must avoid too-perfect impedance matching to not drain the strings

Evidence

One does not always want to maximize energy flow across junctions between two parts of a system. We need the impedance mismatch at the bell end of a trumpet or clarinet to cause reflections and define its resonance frequencies. Impedance mismatches are carefully controlled to achieve desirable timbre in wind and string instruments. For string instruments, large mismatches are required at the points between which strings are stretched, lest the vibrations drain away too rapidly, rendering the string frequencies ill-defined. The infamous wolf note of cellos is a breakdown of this requirement (see section 18.7)—a near impedance matching where none was wanted. — Eric J. Heller, Why You Hear What You Hear- An…, 83 (#expands, via linked claim)

Categorization

• XREF: connects to: Optimal impedance matching uses geometric mean intermediate steps — Eric J. Heller, Why You Hear What You Hear- An…, 551; Sound instruments must balance confinement against letting sound escape; Instrument design exploits impedance mismatches to create resonance and timbre — Eric J. Heller, Why You Hear What You Hear- An…, 83 (+3 more)

Related

• Perfect impedance matching at the lips would ruin vowel fidelity (similarity 0.93)
• Instrument design exploits impedance mismatches to create resonance and timbre (similarity 0.93)
• Sound instruments must balance confinement against letting sound escape (similarity 0.85)
• Bridge resonance presents an impedance minimum, making it flute-like. (similarity 0.84)
• Optimal impedance matching uses geometric mean intermediate steps (similarity 0.83)
• Marimba is an idiophone coupling mechanical and air resonances through the NFC mechanism (similarity 0.82)
• Vocal tract resonances measurably shape wind instrument timbre (similarity 0.81)
• Instrument bodies act as coupled resonators that shape and radiate sound (similarity 0.81)
• Air-to-fluid impedance mismatch would reflect most sound energy without matching (similarity 0.81)
• Soundboard resonances shift lower-register piano string tunings via impedance loading (similarity 0.80)
• Wind instrument resonances resist aligning into a harmonic series because of impedance-mismatch reflections. (similarity 0.80)
• A soundboard optimally transfers vibration without being too resonant itself (similarity 0.80)
• The violin bridge acts as a frequency-tuned impedance-matching intermediary (similarity 0.79)
• Musical instruments are engineered to suppress higher partials to avoid dissonance (similarity 0.79)
• A vibrating body’s sound comes mostly from the attached soundboard, not the string (similarity 0.78)

Broader Connections

• Instrument design exploits impedance mismatches to create resonance and timbre #expands (0.82) — Eric J. Heller, Why You Hear What You Hear- An…, 83
• Perfect impedance matching eliminates reflection while mismatch causes it #expands (0.80)
• Impedance mismatch determines whether a sound pulse reflects or passes #expands (0.78)
• Middle ear impedance match is optimal near 1 kHz #exemplifies (0.75)