I Peripheral Disturbances.- 1 Articulation—Organic Factors.- 2 Phonatory and Resonatory Problems of Organic Origin.- 3 Physiogenic Hearing Impairment in Adults.- 4 Auditory Problems in Children.- II Central Disturbances.- 5 Recovery and Rehabilitation of Adult Aphasic Patients: Relevant Research Advances.- 6 Language Development and Language Disorders in Children and Adolescents.- III Psychological-Interpersonal Disturbances.- 7 Articulation Disorders: Psychological Factors.- 8 Considerations in the Treatment of Articulation Disorders.- 9 Phonatory and Resonatory Problems: Functional Voice Disorders.- 10 Pseudohypacusic Disturbance in Adults.- 11 Stuttering.- Author Index.