Air reed oscillation is driven by pressure pulse reflections at the pipe mouth

Evidence

The flue end of the pipe acts as an open end in terms of the manner in which pulses are reflected (see Figure 4.15). At every instant when a pulse arrives and is reflected from the flue end, the air reed is flipped from inside to outside when a compression pulse arrives and is reflected as a rarefaction pulse, and vice versa when a rarefaction pulse arrives. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1159

Categorization

• DEFINE: Explains the feedback mechanism linking pipe acoustics to reed vibration.
• XREF: connects to: Flue pipes sound through a self-oscillating vortex called the air reed. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1141; Reflected pulses at the flue end flip the air reed’s oscillation direction — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1159; Reed oscillation is self-sustaining through a positive feedback loop of airflow and pressure — David Howard, Jamie Angus, coustics and Psychoacoustics, 1227 (+4 more)

Broader Connections

• Reflected pulses at the flue end flip the air reed’s oscillation direction #expands (0.90) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1159
• Reed oscillation is self-sustaining through a positive feedback loop of airflow and pressure #expands (0.82) — David Howard, Jamie Angus, coustics and Psychoacoustics, 1227
• Reed shutoff produces sharp acoustic pressure variations that drive the resonator #expands (0.78) — David Howard, Jamie Angus, coustics and Psychoacoustics, 1230
• A sound pulse passes an open pipe end unreflected when matching pressure exists outside #qualifies (0.78) — Eric J. Heller, Why You Hear What You Hear- An…, 117
• Reed instruments work as two coupled oscillators, reed and air column #qualifies (0.75) — Eric J. Heller, Why You Hear What You Hear- An…, 1038