Measurement and Analysis of Relevant Room Acoustic Parameters in Speech and Language Therapy Rooms and Evaluation of Their Influence on Objective Voice Quality Metrics

The investigated voice quality measures are largely determined by CPPS. However, CPPS is heavily influenced by room acoustic properties, which can cause unreliable prediction with indices such as AVQI and ABI. Despite these limitations, CPPS remains a strong predictor of perceptual grading and breathiness. For reliable use of objective voice quality metrics in clinical settings, standardization or optimization of recording conditions, or development of more robust analytical methods, is essential. These findings support the refinement of objective voice diagnostics and promote evidence-based approaches in SLT.