Fundamental frequency and sound pressure level of phonation in pathological states

Summary The fundamental frequency (F 0 ) for the habitual pitch (F 0HAB ), F 0 for the lowest physiological tone (F 0L ), F 0 for the highest physiological tone (F 0H ), F 0 range of phonation (F 0 Rg), sound pressure level (SPL) for habitual loudness (SPL HAB ), SPL for the softest tone (SPL S ), SPL for the loudest tone (SPL L ), and SPL range of phonation (SPL Rg) were measured in 40 normal adult subjects and 1,563 voice patients with varying diseases. F 0H , F 0 Rg, SPL L , and SPL Rg were decreased in many disease groups. F 0HAB and F 0L varied. SPL HAB and SPL S were increased in some disease groups. F 0 -related parameters reflected effects of treatments in the cases with polyp, Reinke's edema, epithelial hyperplasia, carcinoma, and paralysis. Effects of treatments were manifested in SPL-related parameters in the cases with nodule, polyp, carcinoma, and paralysis.