(idiomatic) I haven't heard from you for a long time.

(idiomatic) To have an extremely sensitive sense of hearing. / (idiomatic) To hear very well due to being in an exceptionally quiet environment.

(law) To ensure that an accused person has the chance to seek to refute the accusations.

To engage in mental activity without being distracted by noise.

(colloquial) Used to emphasize a command or an opinionated statement.

Used to say that someone or something deserves praise and applause.

Alternative form of one could hear a pin drop

Used to introduce one's understanding of someone's point of view.

(idiomatic) Extremely quiet, for example, as during a lull in a normally bustling place or scene, or at a sudden dramatic or tense moment.

(idiomatic, impolite) Said to dismiss what the interlocutor is saying.