In this set the spelling of /b/ is <b>, and the /ʒ/ sound is spelled <ge>.
The contrast is between a stop and a fricative, both voiced but well separated in the mouth. It is unlikely to be a problem.
The consonant /b/ can occur in any position in the syllable, but /ʒ/
only occurs finally or intervocalically, other than in foreign names.
/ʒ/ is in any case a very rare phoneme, found in only 334 words in
the source dictionary.
The figure for the mean density of this
contrast is 2/5372, too small to signify, while the semantic loading is
100%, since there are no sets of pairs which are inflections of the same
root.
babe beige rubies rouges