Due to this high prevalence, vertebral artery hypoplasia (VAH) has not yet been considered an independent risk factor for ischemic stroke [1,2].
How to use your own headphones on Americanâs new 777-300ER. Passengers traveling in First and Business Class on Americanâs new 777-300ER are provided with Bose QuietComfort 15 Acoustic Noise Canceling headphones to use during the flight.
Since 1964, the company has led tech innovation in all things audio, including televisions, theater systems, speakers and of course, headphones. Though the first set of Bose noise-cancelling headphones â put to market in 1989 â were too big for consumer application, they were widely used in the aviation industry. But decades of innovation have yielded headphones with improved design and performance, which have found a comfortable home in the consumer market.