'Don't make a sound', 3 letters
I don't want to hear it!, 3 letters
Stop talking in the theater!, 3 letters
Use your indoor voice!, 3 letters
Use your inside voice!, 3 letters
Admonition at a surprise party, 3 letters
Admonition to a cell phone user in a theater, 3 letters
Auditorium admonition, 3 letters
Command in a library, 3 letters
Cry hidden seven times elsewhere in this puzzle, 3 letters
Finger-on-lips sound, 3 letters
Finger-to-lips syllable, 3 letters
It may precede Don't let anyone hear!, 3 letters
Librarian's admonishment, 3 letters
Librarian's admonition, 3 letters
Librarian's admonition, maybe, 3 letters
Librarian's reprimand, 3 letters
Librarian's reproof, 3 letters
Librarian's warning, 3 letters
Library admonishment, 3 letters
Library reminder, perhaps, 3 letters
Moviegoer's reprimand, 3 letters
Proctor's admonition, 3 letters
Reaction to a big library volume?, 3 letters
Reaction to a library volume?, 3 letters
Sound at the movies, 3 letters
Sound from a librarian, 3 letters
Sound from a silencer, 3 letters
Sound heard in a movie theater, 3 letters
Sound that asks for quiet, 3 letters
Surprise party admonition, 3 letters
Teacher's admonition, 3 letters
The sound of Silence!, 3 letters
The sound of silence, 3 letters
Theater admonishment, 3 letters
Theatrical injunction?, 3 letters
Whisperer's comeuppance, 3 letters
Whisperer's reproof, 3 letters
C'mon, I'm trying to concentrate!, 4 letters
Admonition on a fishing trip, 4 letters
Librarian's interjection, 4 letters
Sound heard in a reference room, perhaps, 4 letters
Theater or library admonishment, 5 letters
Librarian's admonitions, 4 letters