Reflected pulses at the flue end flip the air reed’s oscillation direction

Evidence

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: Clarifies precisely how reflection of compression/rarefaction pulses drives reed-valve switching in flue pipes.
• corroborated: 2 independent passages support this claim — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1159
• XREF: connects to: Organ reeds self-oscillate through repeated contact-with-shallot cycling.; Reed pipes behave as stopped-end resonators, unlike open-ended flue pipes — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1205; Wind instruments divide into reed and non-reed sound-source types — David Howard, Jamie Angus, coustics and Psychoacoustics, 1160 (+2 more)

Broader Connections

• Organ reeds self-oscillate through repeated contact-with-shallot cycling. #expands (0.80)
• Reed pipes behave as stopped-end resonators, unlike open-ended flue pipes #expands (0.75) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1205
• Wind instruments divide into reed and non-reed sound-source types #expands (0.72) — David Howard, Jamie Angus, coustics and Psychoacoustics, 1160