The Level of Sound
This page is the CodyCross answer for the clue below from Underground Worlds, Group 2161, Puzzle 4 (Wieliczka Salt Mine).
Question is: The Level of Sound
and the answer is: VOLUME
Word Meaning:
VOLUME — A three-dimensional measure of space that comprises a length, a width and a height. It is measured in units of cubic centimeters in metric, cubic inches or cubic feet in English measurement.
Definitions from Wiktionary.