OBJECTIVE: The objective of this study was to evaluate the applicability of the method of nonlinear acoustic analysis (ANL), the analysis of the Visual Standards Vocal Dynamics (PVDV) in the voice of a patient who underwent vertical partial laryngectomy (PVL). CASE REPORT: Male, 61 years old, complained of hoarseness for three months, underwent laryngeal biopsy with histopathological diagnosis of squamous cell carcinoma, stage T2N0M0, was submitted to left cordectomy (buccal margin subglottic margin and the left arytenoids vocal fold to the right) without surgical reconstruction and without supplementary treatment of radiation and chemotherapy. The main surgical sequel was dysphonia. The perceptual evaluation of voice according to the parameters and criteria for classification showed the following results on the scale and indicated G2R2B2A0S0: hoarseness, harshness and breathiness in moderate, and diminished in intensity, fundamental frequency change of air and in coordination speech disorders. For the acoustic analysis was used for qualitative analysis ANL by the PVDV qualitative analyze with the following RESULTS: loops = 2, 2 = regularly and matching of strokes = 1. CONCLUSION: The method applied to the case of ANL was efficient to quantify reliably voice signals with high noise and allowed for a clearer view of the characteristics of this type voice. The voice of the patient undergoing LPV features lots of noise and noise considering an acoustic aperiodic or chaotic, does not allow accurate measurement by conventional acoustic analysis (fundamental frequency, jitter and shimmer and harmonic-noise ratio).