<p class="abstract"><strong>Background:</strong> <span lang="EN-IN">The voice is the main form of communication between humans and the nasal and sinusal cavity participates in the resonance process. An alteration in the nasal diameter can produce changes in the voice. The objective of this study was to relate the degree of nasal obstruction measured by the SNOT 20 questionnaire to the acoustic analysis of the voice. </span></p><p class="abstract"><strong>Methods:</strong> <span lang="EN-IN">58 non-smoker volunteers without laryngeal pathology where included, 25 women (43%) and 33 men (57%). The average age was 22.1 years (±1.7). The laryngopharyngeal reflux and SNOT20 questionnaires were applied together with an acoustic analysis, we measured fundamental frequency, Jitter and Shimmer. The analysis was done separating in groups by sex and by SNOT score (less than 20 points and equal or higher than 20).  </span></p><p class="abstract"><strong>Results:</strong> <span lang="EN-IN">The average of SNOT questionnaire was 15.06 (±11.8), we found no relation between the scores of the SNOT20 questionnaire with Jitter, fundamental frequency, Shimmer or voice intensity (p≥0.01). When separated by groups, the analysis by sex or by scores (SNOT &gt; or &lt; than 20 groups) did not show a statistically significant relationship. </span></p><p class="abstract"><strong>Conclusions:</strong> <span lang="EN-IN">In this study we did not find a relation between changes in acoustic analysis in Fundamental frequency, Jitter and Shimmer and the degree of nasal obstruction measured by SNOT 20. The groups of gender and severity of SNOT did not show relationship. More studies are necessary in order to evaluate the relation of nasal obstruction and the acoustic analysis of the voice.</span></p><p> </p>