Pressure nodes and antinodes structure inside standing waves have complementary velocity counterparts
Evidence
Thus the sound wave will appear to be stationary between the reflecting boundaries, and so is called a standing wave, or, more precisely, a resonant mode. It is important to realize that the wave is still moving at its normal speed-it is merely that, like a toy train, the wave endlessly retraces the same positions between the boundaries with respect to the wavelength, as shown in Figure 1. — David Howard, Jamie Angus, coustics and Psychoacoustics, 383 (
#expands, via linked claim)
Air pressure acts in all directions at the same time and therefore for sound it can be considered to be a scalar quantity without direction; we can therefore talk about pressure at a point and not as a force acting in a partic ular direction. Velocity on the other hand must have direction; things move from one position to another. It is the velocity component which gives a sound wave its direction. — David Howard, Jamie Angus, coustics and Psychoacoustics, 146 (
#complicates, via linked claim)
Categorization
- XREF: connects to: Every normal mode contains stationary nodes where no motion occurs; Standing waves arise from counter-propagating reflections with no net energy flow; Sound waves reflecting between two boundaries can form standing waves — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 386 (+3 more)
Related
- A standing wave is still moving at normal speed while appearing stationary (similarity 0.89)
- Standing waves arise from counter-propagating reflections with no net energy flow (similarity 0.83)
- Sound waves reflecting between two boundaries can form standing waves (similarity 0.82)
- Opposing waves cancel only momentarily because energy persists in kinetic form (similarity 0.81)
- Standing waves can form without two bounding reflectors (similarity 0.81)
- Pressure is scalar while velocity gives a sound wave its direction (similarity 0.80)
- Opposing traveling waves of the same frequency create standing waves with nodes. (similarity 0.80)
- Sound pressure and particle velocity components are always in phase (similarity 0.79)
- Standing waves are a subclass of the more general phenomenon called resonant modes (similarity 0.79)
Broader Connections
- A standing wave is still moving at normal speed while appearing stationary
#expands(0.85) — David Howard, Jamie Angus, coustics and Psychoacoustics, 383 - Pressure is scalar while velocity gives a sound wave its direction
#complicates(0.80) — David Howard, Jamie Angus, coustics and Psychoacoustics, 146