The severity of dysphonia is traditionally assessed by perceptual means, and several scales are currently in use (GRBAS, RBH, CAPE-V). Many objective (optical, electrical, acoustical) measures have been developed to compensate the subjectivity of perceptual assessment. However, to date, these measures have failed to be sensitive (reflect changes of the perceptual trait), specific (reflect changes only of the intended perceptual trait), and consistent (with similar results across different studies) enough to be adopted in clinical practice. When there is no satisfactory correspondence between a perceptual rating and its purported objective correlate, the error(s) can arise from four possible sources/reasons:

• The objective measurement
  

• The perceptual ratings
  

• The procedure to establish the correspondence
  

• Actual absence of correspondence
  

This project (codenamed "Ronquera" as the Spanish for "Hoarseness") attempts to obtain more sensitive, specific, and consistent measures of dysphonia in the German RBH scale (roughness, breathiness, hoarseness), addressing problems in the four possible causes of correspondence.