Driven resonator phase shifts 180 degrees across its resonance

Evidence

The vocal folds are a high-impedance drive; their motion is almost unmodified by any feedback from the vocal tract. This fact is perhaps the seat of the source-filter confusion: if the drive (vocal folds) do not respond to feedback from the vocal tract, how can the latter be anything but a filter? The fallacy of this statement is the essence of resonance as discussed in many places in this book: passive amplification is possible, coaxing a drive that is anyway wasting most of its power to put out more power in certain frequency ranges, without actually changing anything the drive is otherwise doing. — Eric J. Heller, Why You Hear What You Hear- An…, 1677 (#qualifies, via linked claim)

Categorization

• XREF: connects to: Spontaneous emission spacing reflects the frequency step producing 180 degrees of phase shift.; Passive cavity resonance can amplify a drive without altering its motion — Eric J. Heller, Why You Hear What You Hear- An…, 1677; Dipole sources amplify through near-field capture, phase shift, and reemission by a resonator (+1 more)

Related

• Resonance requires confined old amplitude returning in phase with fresh drive amplitude (similarity 0.90)
• Passive cavity resonance can amplify a drive without altering its motion (similarity 0.88)
• Steady driven motion oscillates at the drive frequency, never the natural one (similarity 0.85)
• Dipole sources amplify through near-field capture, phase shift, and reemission by a resonator (similarity 0.84)
• Driven systems settle to the drive frequency, responding weakly, not their natural one (similarity 0.83)
• A 180-degree phase shift occurs crossing any isolated resonance (similarity 0.79)
• All resonance reduces to structure, drive, and in-phase response (similarity 0.79)
• Changing a component’s phase by 180 degrees is equivalent to subtracting that partial (similarity 0.78)

Broader Connections

• Dipole sources amplify through near-field capture, phase shift, and reemission by a resonator #expands (0.85)
• Passive cavity resonance can amplify a drive without altering its motion #qualifies (0.78) — Eric J. Heller, Why You Hear What You Hear- An…, 1677