Hi, can you show images of the relevant code parts (AI perception logic, hearing sense config and behavior tree) ?
If you only call one noise event, then it will only perceive one. Without seeing the acutal code my guess is that you either call it constantly, not setting your blackboard values correctly from the AI perception and/or not having the hearing sense config setup correctly in conjunction with how you set the blackboard values (e. g. if you set MaxAge to 0, then SuccessfullySensed will always be true, it will never become false).