There is provided an earpad that is attachable to a housing capable of containing an audio signal processing unit and includes a ring-shaped cushioning member and a covering member covering the ring-shaped cushioning member. In the earpad, the ring-shaped cushioning member includes an outer ring member,...http://www.google.com/patents/US8213662?utm_source=gb-gplus-sharePatent US8213662 - Earpad and headphones
