I've always thought it'd be great to have a mask/muzzle that turns a babies cry into laughing or something else more pleasant while seated next to them on the plane.
Wearing sunglasses could be seen as either way. You are definitively dimming the raw luminous stimuli that reaches your eyes, but you could argue that your are not dullying your senses but just filtering a part of the spectrum with low signal-to-noise ratio, so your senses are enhanced as a result. Technology can be seen as an extension of human capacity. That's what tools are all about.
This thing in the ear, it does not give you beyond human capacities, neither helps you recover regular capacities you lost by whatever circumpstances. This just let you pay for the privilege of not having to develop your capacities to begin with.