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.