In-pressure-zone rooms sources radiate less sound due to altered acoustic impedance

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 (#corroborates, via linked claim)

Categorization

• XREF: connects to: Maximum sound output requires balancing radiation loss against internal friction; Bounded sound waves change impedance with tube area, causing reflections — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 174; Room boundaries alter a sound source’s radiated power, not just its perceived sound — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2134 (+1 more)

Broader Connections

• Room boundaries alter a sound source’s radiated power, not just its perceived sound #corroborates (0.95) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2134
• Room acoustics act as another system modifying the instrument’s output #exemplifies (0.92)