True envelopment requires delayed signals that only multichannel playback can supply

Evidence

Here it is necessary to emphasize that reflections occurring in small rooms cannot alone generate a sense of true envelopment. Envelopment requires delays (more than about 80 ms) that can only be supplied by recorded signals reproduced through multiple loudspeakers. Additional room reflections of those greatly delayed signals may enhance the impression, but the initial delay and the appropriate directions must be provided in the recorded sound and an arrangement of playback loudspeakers. — , Toole, Floyd E - Sound reproduction-…, 1694

Categorization

• XREF: Connects to the reader’s earlier curated highlights on IACC, ASW, and late side arrivals as the perceptual basis of concert-hall envelopment. — connects to: Envelopment in small rooms must come from recordings rather than natural reflections; True envelopment requires delays beyond 80 ms that rooms cannot supply; Envelopment can be reproduced with few channels, not hundreds (+4 more)
• DEFINE: Clarifies why ‘diffused room ambience’ alone can’t simulate a concert hall.

Related

• True envelopment requires delays beyond 80 ms that rooms cannot supply (similarity 0.93)
• Envelopment can be reproduced with few channels, not hundreds (similarity 0.91)
• Envelopment in small rooms must come from recordings rather than natural reflections (similarity 0.90)
• True envelopment needs reflections delayed beyond 80 ms, impossible in small rooms alone (similarity 0.87)
• Room diffusion is not required for perceived spaciousness (similarity 0.86)
• Accurate soundstage alone cannot satisfy musically without reproduced hall reflections (similarity 0.86)
• Multichannel audio delivers directional reflections and long delays matching large venues (similarity 0.83)
• Wide-dispersion speakers plus room reflections create listener envelopment. (similarity 0.83)
• Stereo recordings strip away the delayed sounds essential to live music (similarity 0.82)
• The listening room’s influence is suppressed during multichannel playback (similarity 0.82)
• Multichannel and immersive audio reduce the perceptual importance of small-room reflections. (similarity 0.81)
• Multichannel recording content masks room acoustics and loudspeaker resonances (similarity 0.81)
• Music listeners prefer reflections far stronger and later than small rooms provide. (similarity 0.81)
• A small listening room’s first reflections mask the recorded acoustic space (similarity 0.81)
• Wide-dispersion loudspeakers with room reflections create a you-are-there listening perspective (similarity 0.81)

Broader Connections

• Delay loudspeakers should lag the acoustic signal by about 15 ms #exemplifies (0.85)
• Stereo recordings strip away the delayed sounds essential to live music #corroborates (0.80) — , Toole, Floyd E - Sound reproduction-…, 805
• Spatial envelopment requires uncorrelated ear signals, not a diffuse sound field #expands (0.78)
• The listening room’s influence is suppressed during multichannel playback #expands (0.75)