Take the 2-minute tour ×  Can one whisper t'fila (prayer)? I'm
thinking of obligatory t'filos like sh'mone esre and "Sh'ma".  I
know one can speak t'fila quietly, even very quietly; in fact,
sh'mone esre is said quietly. I'm not asking about loudness
versus quietness but specifically about whispering. As Wikipedia
notes:  In normal speech, the vocal cords alternate between
states of voice and voicelessness. In whispering,… the vocal
cords alternate between whisper and voicelessness (though the
acoustic difference between the two states is minimal).  In
other words, whispering is speaking without the use — or with
minimal use — of the vocal cords. All consonants and vowels
become largely or completely devoiced. This is independent of
loudness: it can be done pretty loudly, and normal speaking can
be done quietly.  (The words תִּזְכְּרוּ and תִּשְׂכְּרוּ thus
come out almost the same — but not quite. One difference lies in
the fact that whispering generally doesn't completely remove
voice (as noted in the Wikip