NSP_
Vocal range exists but its span is below the threshold for reliable derivation (Bandhopadhyay 2019: day-to-day range noise is 2–4 st; traditional placement needs 7 st floor + 17–19 st headroom).
Vocal range exists but its span is below the threshold for reliable derivation (Bandhopadhyay 2019: day-to-day range noise is 2–4 st; traditional placement needs 7 st floor + 17–19 st headroom).