A method and system that processes voice and non-voice data is configured to insure that the processing of the voice data is given priority over the processing of the non-voice data, to ensure that callers experience smooth, uninterrupted conversations. The filament has a wire diameter d which is gradually reduced from the longitudinal central region to the longitudinal ends while the coil outside diameter D is fixed along the longitudinal direction. Each of the plurality of pixels includes a reflection area and a transmission area.