a doorbell converts electrical energy into sound energy
electricity is stir. electrical_power_generation is energy_conversion_process. doorbell is door_signaling_device. spark_plug is electrical_component. doorbell is not electrical_device. nerve_impulse is electrical_discharge. electrical_fan_mechanism is electrical_component. spark_plug is electrical_device. electrical_power_generation is not energy_conversion_process. doorbell is electrical_device.