Place it right after someone vanishes from frame or leaves a call, then follow with a huh reaction if they stay missing, and add sudden suspense before cutting to the empty chair, doorway, or map position they should have occupied.
关于此声音
A one-second Russian voice clip of a person asking, in effect, 'where are you right now,' delivered as a direct, searching call-out. It lands as impatient and a little exasperated, the tone of someone tired of waiting and wanting a location immediately, which makes the brief question feel funny in everyday mix-ups.