Deaf children (1) Certification (1) Tongue (1) Time (1) Synthesizer (Musical instrument) (1) Research (1) Occupations (1) Methodology (1) Learning, Psychology of (1) Language and languages (1) Health (1) Children with disabilities (1) Special education (1) Evaluation (1) Education (1) Design (1) Deaf (1) Communication (1) Sintetizador (1) Evaluación (1) Salud (1) Certificación (1) Sordos (1) Lengua (1) Niños sordos (1) Niños con discapacidad (1) Voz (1) Educación (1) Diseño (1) Lenguaje (1)