Provided are an apparatus and method for measuring a dielectric constant. The device comprises a polymer foam plate impregnated with a mixture of an inorganic filler and an organic binder, the foam plate being shaped so as to be in close contact with the sheet m\xe9tal panel of the bodywork and with the inner trimming panel. The ventilator interface module has an outlet port through which nebulized particles of the drug solution can be communicated to a user, and an inlet port through which the housing receives intake gas.