Muted Speaker on Telegram

What it signals here

sticker mapping

Maps to silence/shush sticker packs; often found in packs themed around reactions or media controls.

channel use

Used by channel admins to indicate comment sections are restricted or that a broadcast-only mode is active.

group meaning

Sent in groups to signal that a spammy member should quiet down, or that the sender is muting the chat.

bot context

Bots may use this emoji to confirm that notification muting has been applied to a chat or channel.

See it elsewhere