Spatial low bass below 50-63 Hz has an audible directional cutoff

Evidence

Martens et al. (2004) identify a “cutoff-frequency boundary between 50 Hz and 63 Hz”, these being the center frequencies of the octave bands of noise used as signals. Recent discussions among knowledgeable people in an audio forum revealed strong opinions in favor of spatial low bass, especially in classical recordings. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1657

Categorization

• QUESTION: The chapter admits no definitive experiments exist yet on delivering low-bass spatial cues — worth tracking as open research.