A delayed sound can be 10 dB louder and still lose the localization battle

Evidence

Consider a loud note played from stage. Direct sound reaches the audience first, followed shortly by sound that has bounced once off a wall or ceiling. This early sound is clearly directional, and we use it to determine the location of the source. Sound arriving later from the same note has traveled farther, bouncing many times off back and side walls and ceilings and diffracting off statuary, balconies, and so on, and is nearly omnidirectional. In a rather reverberant hall with a T60 of 3 seconds, the sound will have traveled a kilometer before its last remnants reach the audience’s ears. The late sound has spread uniformly throughout the space and is moreover propagating every which way, equally. — Eric J. Heller, Why You Hear What You Hear- An…, 2471 (#corroborates, via linked claim)

Categorization

  • XREF: connects to: Ear localizes to first-arriving sound unless delayed signal exceeds 12 dB louder; Delayed loudspeakers preserve direct-sound localization in public venues.; Early reflected sound localizes sources while late sound becomes directionless — Eric J. Heller, Why You Hear What You Hear- An…, 2471

Broader Connections