A measuring method to determine the noise emission of an electric motor is proposed in which the vibrational excitation of the running electric motor is measured by a laser vibrometer device and this measured vibrational excitation is correlated with a noise level. A lens is formed having a shape defined by the optical transfer function. The active set of cells comprises a list of cells to which the user equipment can move from the serving cell. In one embodiment, general purpose registers within the first processing engine and within the second processing engine are employed to implement the register pipe. The first, second and third surfaces define a cavity within which is disposed dielectric material. In addition, the electrocontrol switch of the voltage-resistant electrocontrol switch contains inside high-voltage-resistant insulated oil for enabling the voltage-resistant electrocontrol switch to be resistant to high voltage for AC running through.