Lips only begin oscillating as a reed once airflow passes a threshold
Evidence
The double reed action of the lips can be illustrated if the lips are held slightly apart, and air is blown between them. For slow airflow rates noth ing is heard, but, as the airflow is increased, acoustic noise is heard as the airflow becomes turbulent. If the flow is increased further, the lips will vibrate together as a double reed. This vibration is sustained by the physi cal vibrational properties of the lips themselves, and an effect known as the “Bernoulli effect.” — David Howard, Jamie Angus, coustics and Psychoacoustics, 1263
Categorization
- XREF: connects to: Reed oscillation is a damped spring cycle renewed by airflow — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1199; Free reeds produce fewer high harmonics because airflow never fully stops — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1203; Elastic lips and vocal folds self-oscillate once energy input begins. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1237 (+5 more)
Broader Connections
- Elastic lips and vocal folds self-oscillate once energy input begins.
#corroborates(0.85) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1237 - Reed oscillation is a damped spring cycle renewed by airflow
#expands(0.82) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1199 - Elastic lips sustain oscillation only when energy is continuously input
#qualifies(0.78) - Reed shutoff produces sharp acoustic pressure variations that drive the resonator
#expands(0.78) — David Howard, Jamie Angus, coustics and Psychoacoustics, 1230 - Organ reeds self-oscillate through repeated contact-with-shallot cycling.
#exemplifies(0.72) - Free reeds produce fewer high harmonics because airflow never fully stops
#qualifies(0.70) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1203