Place it after a Discord call sound at the point a call fails, then follow it with an Anime Wow sound when the caller realises nobody is coming. That order turns one missed connection into a short running gag, and keeps the focus on the failed call rather than on any other effect.
關於此聲音
This is a 7.5-second Japanese telephone announcement telling the caller that the number cannot be reached, delivered in a calm, formal recorded voice. It gives the listener the flat, slightly awkward feeling of a call ending before anyone answers, like a door closing on a conversation that never started.