Multichannel spaciousness requires bypassing inverse-square-law propagation loss

Evidence

To summarize, it is well established that the perception of spaciousness and envelopment is a major motivation for multichannel audio. Figure 8.12 shows persuasively that this is difficult to deliver to multiple listeners in small rooms unless one employs loudspeakers with less than the common inverse-square-law propagation loss. Long line sources are an improvement, and CBT loudspeakers are an interesting option. — Toole, Floyd E, Sound reproduction- the acoustics and…, 843

Categorization

• ADDENDUM: Relates to ‘Grafting & Growth’ only loosely; stronger echoes with trees-as-infrastructure framing of overcoming natural loss. Actually connects to the reader’s ongoing psychoacoustics thread on what makes immersive audio work.