Effectiveness of voice therapy in patients with functional dysphonia.

The purpose is to examine effectiveness of voice therapy in patients with functional dysphonia.

1. Comparing the short- and longterm outcome of different therapies in these patients.

2. Comparing the outcome of intensive short-term therapy with less intensive long-term therapy.

3. Comparing the outcome of a well-designed voice program in professional voice users versus non vocal professionals with functional dysphonia.