Enter a clue or pattern or both:
Sounds seeking attention (4 letter answer)
The answer PSTS is seen occasionally, appearing about once every 900 puzzles.
Signals for silence
Sounds seeking silence
PST as a noun:
1. (Pacific Time, Pacific Standard Time, PST) = standard time in the 8th time zone west of Greenwich, reckoned at the 120th meridian west; used in far western states of the United States