Mutt Muffs (www.safeandsoundpets.com/index.html)
offers hearing protection for dogs that fly with their owners in light aircraft. Aviators know how loud it gets in the <snip>pit, and if it gets too loud for them, it gets even louder for dogs who have a keener sense of hearing then humans.
Mutt Muffs are a patent- pending invention of pet owner Michele McGuire who noticed her dog Cooper acted a bit frazzled when flying with her in her Cessna. After spending money on engineers and doggie treats, she came up with the right design, and now Cooper enjoys flying as much as Michele.