The invention relates to a mixing device with an input container that is configured for receiving a product that includes a fluid component and a second component. The modulation-driving current is intensity-modulated to vary across a value of a bias current. An internal power-supply terminal has a holding portion, a concave portion, two insertion strips, and a brush-holding projection. An integrated circuit device is housed in the shears and connected to the level for obtaining and storing data therefrom. An adding section adds the base layer decoded signal and enhancement layer decoded signal to obtain a speechsound signal.