Given that most perks in the game have a counter of some sort or other, I can't help feel that a survivor perk which would counter Whispers is in order?
As the perk is very specific though, the counter should also be, in that you run it and the ONLY thing it would work against would be Whispers alone. Call it what you will, have it work however you like, but one suggestion would maybe be similar to the Diversion perk, ergo maybe the survivor has to be within the killer's terror radius to build up a 'rock' / device that they can then either use it to 'throw' their 'Whispers position' a full 16m or so away, or perhaps better would be that it would simply hide them from the Whispers perk and the killer would lose all signal of them being in range of it for a certain length of time (even just 5 seconds would be something.)
So, in short, Anti-Whispers perk, let's call it 'Not Hear' (as I don't think Jedi Mind Trick would go down well with Disney):
- Time in TR 'til activation = 10 seconds
- Effect lasts 6 seconds (auto) or 8 seconds (device thrown 16m away from position)
- Cooldown = 30 seconds.