Sound that plays if the player is near the part

[whatplayer5858 (keklik)]

I made a killer. I want to add a sound that plays if the killer is near the player(or the player is near the killer).
Help please

[NoTaxEvading (kneebandit49)]

Place a sound in the killers head and change the maximum distance that the player can hear the sound

This is how it should look like: