Would it help with Spasmodic Dysphonia and vocal tremors?

Would it help with Spasmodic Dysphonia and vocal tremors?

Respiratory Muscle Training has been shown effective in related cases of dysphonia, dystonia, and voice tremor, by increasing pressure for voice production and improving voice quality, intensity and quality of life.

Strengthening of respiratory muscles by application of the Breather can improve congenital as well as exercise-induced vocal fold pathologies. Regular respiratory muscle training (RMT) with the Breather can lead to reduced dyspnea during speech and exercise and to increased exercise capacity. Y