A soybean cultivar designated 4337175 is disclosed. A second deposited oxide film 112 having a base opening portion 118 and a P+ polysilicon layer 115 that will be made into an emitter connecting electrode filling the base opening portion are formed on the Si-cap layer 153, and an emitter diffusion layer 153a is formed by diffusing phosphorus into the Si-cap layer 153. The first and second gray-scale voltages depend on the first and second gamma curves. The facing is detachable from the cushion to keep the earpad clean.