สัญญาณ

signal strength/reception

The strength or quality of a received signal (e.g., mobile network bars, Wi‑Fi, TV, or radio reception).

signal; sign; indication

A sign or transmitted information that conveys a message, warning, or instruction (e.g., light, sound, gesture, electrical signal).

cue (in communication/behavior)

A cue or hint that prompts an action or indicates a state (e.g., a social cue or timing cue).