Design for dogs.

From the NY Times (full article).

The Goods: Ready for the Red Baron
By BRENDAN I. KOERNER
Published: March 26, 2006

If human pilots can wear bulky headsets while flying, why can’t dogs? Mutt Muffs are especially contoured for a dog’s skull.

The main differences between Mutt Muffs and their human-oriented counterparts are in the curvature of the ear cups and in the length of the band that connects them. The design had to account for the fact that a dog’s head is more rounded than a human’s, Ms. McGuire said. She rejected many early prototypes on the grounds that the ear cups weren’t curved enough, and thus didn’t entirely seal off the ears. Also tossed onto the scrap heap were models with connectors that were too long and didn’t fit snugly over Cooper’s head.