Wall proximity alternately boosts or suppresses a source depending on phase.
Evidence
Waterhouse (1955) extended work by Rayleigh (1964) and confirmed experimentally that the power output of a source is affected by the presence of boundaries, for example the walls in a room. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2134 (
#expands, via linked claim)
Categorization
- XREF: connects to: Pipe walls raise air impedance by reflecting pressure pulses back in phase; Room boundaries alter a sound source’s radiated power, not just its perceived sound — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2134; A finite source-to-wall distance creates a destructive interference null at the half-wavelength frequency (+2 more)
Broader Connections
- A finite source-to-wall distance creates a destructive interference null at the half-wavelength frequency
#exemplifies(0.90) - Pipe walls raise air impedance by reflecting pressure pulses back in phase
#corroborates(0.85) - Room boundaries alter a sound source’s radiated power, not just its perceived sound
#expands(0.85) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2134 - Proximity to a resonator suppresses, rather than amplifies, monopole sound sources
#exemplifies(0.80) — Eric J. Heller, Why You Hear What You Hear- An…, 1889 - Intermediate separations cause loudness to follow intensity addition instead of pressure addition.
#expands(0.75)