The audio market is full of headphones that strive to put out the most balanced, best sound signature possible, so listeners can hear every sonic detail in their favorite tunes precisely as "the artist intended." It’s a noble pursuit, but it assumes we’re all hearing the same things. In reality, much like eyesight, we all hear differently—and our ears continue to change as we age. I enjoyed using the Nuraphones when I reviewed them earlier this year.