Dropper and dispenser sound is not directional

The clicking sound made by Droppers and Dispensers stays at the same volume when you move away from it in any direction, until it just stops when you walk out of it's range.

I would expect the sound to be directional, like the other sounds in game made by mobs and doors etc, and to fade out as you move away.

To reproduce, create a simple redstone clock setup as pictured in the attached image, and move away from the clicking Dispenser/Dropper.