Many inspection methods used for the weld disturbances detection and localization are based in the welding parameters evaluation through direct measurement; the direct measurement implies the insertion of sensors on the welding process which somehow could alter the behavior of the metallic transference. An inspection method that evaluates the GMAW process evolution from the non-intrusive GMAW welding process sensing besides allowing the identification of disturbances during at weld execution and reducing to the times of inspection also reducing the interference on the process produced for the direct sensing. In this paper was developed a nonintrusive method to weld quality estimation. This method is based in the acoustic sensing of the electrical arc. From sound produced by the electric arc in the repetitive welding experiments with and without disturbances was calculated the AIF (Acoustical Ignition Frequency) and SPL (Sound Level Pressure) parameters. A statistical control applied to AIF and SPL acoustical parameters was used to detect the welding disturbances. The results have showed that the acoustic sensing is appropriated to be used as an indirect estimator of the weld quality in the GMAW process.