I think sometimes you’re just so emotional and moved by a song or an artist that you want to share that moment with your dog… and you dog can hear above 20kHz

I can’t be the only one here who shares my headphones equally with my pet chinchilla.

To add another point, just b/c headphones can play to 38kHz does not mean it will be used. I’m not sure of a lot of context that even is mixed to include frequencies so high.

so you can annoy the fuck out of your dog

Pro here: it’s because it means it will operate comfortably within the human hearing range. Think of it the same way you would think about headroom. Also, just because you don’t hear it, doesn’t mean you don’t feel it.

If you want a transducer to go out to 20kHz in a well behaved way then it needs to have the headroom beyond 20kHz to do this effectively.

The extended range helps stop roll-off in the sub-bass and high-treble.

That adds kick and brightness to the lowest and highest notes. Since the drivers CAN go beyond human hearing it also means that the limits of human hearing are WELL within the abilities of the drivers–without pushing their physical and electronic limits.

So your dog can enjoy them, too.

Simply, if you slap a filter on it, you will screw up the sound.