Análise do grau global e tens？o da voz em cantores de roque

background: overall voice and strain level analysis in rock singers. aim: to analyze the voice o rock singers according to two specific parameters: overall level of vocal deviation (olvd) and strain level (sl); to compare these parameters in three different music samples. method: participants were 26 male rock singers, ranging in age from 17 to 46 years (mean = 29.8 years). all of the participants answered a questionnaire for sample characterization and were submitted to the recording of three voice samples: brazilian national anthem (bna), satisfaction and self-selected repertoire song (rs). voice samples were analyzed by five speech-language pathologists according to olvd and sl. statistical analysis was done using the software spss, version 13.0. results: statistically significant differences were observed for the mean values of olvd and sl during the performance of satisfaction (olvd = 32.8 and sl = 0.024 / p=0.024) and during the rs performance (olvd = 38.4 and sl = 55.8 / p=0.010). the values of olvd and sl are directly proportional to the samples of the bna* and rs**, i.e. the higher the strain the higher the olvd (p,0.001*; p=0.010**). when individually analyzing the three song samples, it is observed that the olvd does not vary significantly among them. however, the mean values present a trend to increase from non-rock to rock performances (24.0 bna / 32.8 satisfaction / 38.4 rs). the level of strain found during the bna performance presents statistically significant difference when compared to the rock performances (satisfaction and rs, p=0.008 and p=0.001). conclusion: the obtained data suggest that rock style is related to the greater use of vocal strain and that this strain does not necessarily impose a negative impression to the voice, but corresponds to a common interpretative factor related to this style of music.