| I think it's softer [(the /Z/)], isn't it? |
|
Yes. But the real difference is
voicing.
English has 16 consonants which form 8 unvoiced-voiced pairs.
With the unvoiced member of the pair listed first, these are [p, b],
[t, d], [k, g], [f, v], [th, TH], [s, z], [S, Z], [tS, dZ]. (/th/
= "th" in "thin"; /TH/ = 'th" in "this"; /tS/ = "ch" in "chin"; /dZ/ =
'j" in "jet").
Other than the voicing, the two members of each pair are pronounced
with the tongue, jaw, lips, etc., all in the same position. In
other words, there is no difference except voicing between p and b or
between S and Z, etc.
Place your hand on your throat as you say these. The voiced
consonants produce vibration in the throat. You can sing
these. The unvoiced consonants produce no such vibrations; they
cannot be sung because they are essentially composed of air! They are
patterns of air escaping the mouth without any real tone provided by
the vibration of the vocal folds in the throat.
"h" is an unvoiced consonant without a voiced counterpart, and all the other consonants of English are voiced (m, n, ...).
CJ