ok I tried going the C++ route, and for particle effects, emitting sound and making AI aware of a sound being emitted and it does work.
First step was to add
`
if (ProjectileImpactEffect)
{
UGameplayStatics::SpawnEmitterAtLocation(GetWorld(), ProjectileImpactEffect, GetActorLocation());
if (ProjectileImpactSound)
{
UGameplayStatics::PlaySoundAtLocation(this, ProjectileImpactSound, GetActorLocation());
UAISense_Hearing::ReportNoiseEvent(GetWorld(), GetActorLocation());
}
into the TestingGroundsProjectile.cpp “OnHit()” function conveniently there already for when the projectile hits bodies that simulate physics to indicate impact and to Report Noise events.
Added UAISense_Hearing::ReportNoiseEvent(GetWorld(), GetActorLocation(), 1.0f, this); to the first person character as well to indicate that he makes noise when he fires his weapon.
I tried registering the projectile as it exploded on impact, but I found out that the AI sensing works on pawns and that detecting a name of an actor (projectile) is a thing you’d do by using environment query system or EQS if I’m right and I think I’ll leave it for now 
Found the info on that here.
In the end it turns out like this
