Boundaries alter bass output by changing the loudspeaker’s acoustical radiation resistance

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: Horns and boundaries both concentrate sound into restricted solid angles; Room boundaries alter a sound source’s radiated power, not just its perceived sound — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2134; Room boundaries alter loudspeaker output through reflected image sources (+1 more)

Broader Connections

• Room boundaries alter a sound source’s radiated power, not just its perceived sound #expands (0.92) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2134
• Speaker power output changes with room dimensions only via their ratios #contradicts (0.78)
• Room boundaries alter loudspeaker output through reflected image sources #complicates (0.75)