A sound device includes an input terminal for electronic signal input; a line out terminal adapted to output electronic signals input on the input terminal to an external area; a delay arrangement adapted to delay electronic signals input on the input terminal for a certain time; a main output arrangement adapted to output electronic signals delayed by the delay arrangement. An input conductor disposed in the housing is configured to carry an input voltage. The shield plates prevent a conductive material generated by etching a wafer from sticking to the overall inner surface of the reaction tube.