Audio-Technica rolls ANC7b headphones

Audio-Technica grew its still-small noise-reduction headphone line today through the ATH-ANC7b, its main and only over-ear model in the category. It upgrades an earlier outgoing model with a purportedly more natural and richer sound. It continues to use an active cancellation process with dual microphones that pick up outside sound; the company believes about 85 percent of outside sound is elimi…