A storage device assembling module for assembling a storage device in an electronic apparatus includes a main frame, an adapter, and at least one handgrip. The black level regulating unit has a frame integration average holding unit. When a signal is outputted from the output line to a buffer circuit by sequentially connecting the capacitive element to the output line in the first memory block, all connections between the capacitive elements and the output line are disconnected in the second and third memory blocks with the output line of the first memory block and the output line of the second memory block connected. Passive, ring-shaped electrodes are positioned at the ends of the wall and connected to resistors which are then grounded. Similar functions may also be performed by a computing device, such as a server to coordinate calibration of the microphone of the network device.