Acústica. Líneas isofónicas normales.
Acoustics -- Normal equal-loudness-level contours
Acoustique. Lignes isosoniques normales.
Buy on AENOR
See part of the content of the standard
13.140 / Noise with respect to human beings
CTN 74/SC 1 - Noise
ISO 226:2003 (Identical)
Cancel: UNE 74003:1992
