This is the biggest misconception about the game that I've seen even high levels believe in. The ghost can't follow you or know your position via your voice during hunts! It's an entire line of sight, and voice recognition only really works to give you responses while you're in the ghost room. So, an average hunt works like this:
1. The ghost picks a target, which can change depending on the line of sight and proximity.
2. When chasing a player, the ghost will shoot an invisible line between it and the player's head, which means crouching might actually save you sometimes. If it fails, it currently forgets about you completely until it sees you again.
3. When not chasing, it will wander around shooting those invisible lines, referred to as raytraced straight from the ghost, and then another slightly to the right if it fails to detect anything. If the ghost is not a banshee, it will cast two ray traces to each player, and if those fail, it will basically just wander again with having one player in mind, which doesn't matter in practice.
Yeah, nothing is influenced by the sound player makes, even when blasting loud music. However, if the ghost does kill you because you were doing that, the chances are that it just wandered into your room randomly. The best way to check this is to follow the ghost when you are dead, its movement seems not to follow any logic at all, and it just checks a room, if it sees nothing, checks another room in the house, etc.
As of January 11th, 2021, this is no longer the case in beta.