Soft ::
Soft
(superl.) Belonging to the class of
sonant elements as
distinguished from the surd, and
considered as
involving less force in
utterance; as, b, d, g, z, v, etc., in
contrast with p, t, k, s, f, etc..
Voice ::
Voice (n.) Sound of the kind or
quality heard in
speech or song in the
consonants b, v, d, etc., and in the
vowels; sonant, or
intonated, utterance; tone; --
distinguished from mere
breath sound as heard in f, s, sh, etc., and also
whisper..