Patent ID: 8442258

Claim:
A headphone comprising: a headband; an ear cup attached to the headband; a baffle plate fixed to the ear cup and having a rib wall at its periphery; an ear pad engaged with the baffle plate; and a gas-permeable buffer between the ear cup and the baffle plate, wherein the buffer and the rib wall prevent a reduction in volume of a front air chamber caused by lateral pressure, and wherein the buffer comprises a first element at an inner periphery, a second element at an intermediate, and a third element at an outer periphery, the first, second, and third buffer elements having different rigidities, wherein the first buffer element comprises a gas-permeable material and has rigidity higher than that of the second buffer element, and the third buffer element comprises a gas-impermeable material and has rigidity higher than that of the second buffer element, the third buffer element functioning as a substitute for the rib wall.