Should'nt LegendaryGoji's roar travel further???

I think 20 miles not gonna lie because of his size

Well, I'm willing to bet that we haven't even heard his truly loud roars up to such levels.

Well, all I know is his roar would travel much farther under water.

I think his roar can be heard all the way into deep space. They could use that idea for Ghidorah. Like say Ghidorah was traveling through, and heard the roar and follwed it here.

On land, it would probably travel for about 25 miles under the right conditions.

In water, it might travel for 30+ miles.

I felt that one of the things missing from the G-2014 film was hearing the roars from off camera, while the humans did their activities. The older films always had that, and I always liked it. It made it feel like the monsters were always in the scene, even when they weren't really. 

No! They said that his roar could be deafening 3 miles away, not that it only travelled 3 miles! Why do people not pay attention?

@Ariccio

Well, everywhere im reading says it travels 3 miles