Perceptual evaluation of hypernasality, audible nasal airflow and speech understandability using ordinal and visual analogue scaling and their relation with nasalance scores

This study confirms that visual analogue scale ratings form a reliable and valid alternative for ordinal ratings in the perceptual judgments of hypernasality, audible nasal airflow and speech understandability. A combination of both rating scales may even combine the advantages and eliminate their limitations. However, further research is necessary to verify how this new approach can be implemented in available protocols for clinical practice, audits and research.