binary logarithms
... that binary logarithms can be used to determine the number of octaves between two musical tones?
... that <b id="mwCSE"><a href="./Binary_logarithm" id="mwCSI" rel="mw:WikiLink" title="Binary logarithm">binary logarithms</a></b> can be used to determine the number of <a href="./Octave" id="mwCSM" rel="mw:WikiLink" title="Octave">octaves</a> between two <a href="./Musical_tone" id="mwCSQ" rel="mw:WikiLink" title="Musical tone">musical tones</a>?