In this manuscript we present the interfacial characterization of poly(pyrrole) films doped with dodecylbenzenesulphonate anions (DBS) electrosynthesized under the influence of ultrasonic radiation. The modified electrodes were studied by means of scanning electron microscopy and electrochemical experiments. It was shown that the ultrasonic radiation changes the Morphology of the deposits producing smoother films, with distinct voltammetric behavior. A detailed study employing the electrochemical impedance spectroscopy was done where important features such as the charge-transfer resistance, intercalated charge distribution and double-layer capacitance were discussed. The results showed herein are of great importance on the development and characterization of electroactive surfaces where modified electrodes can be easily obtained by using the ultrasonic radiation and the studies of electrochemical based devices such as sensors, biosensors and supercapacitors can be boosted. (C) 2016 Elsevier B.V. All rights reserved.