Go to an academic data base, pull up professional journals devoted to otolaryngology, deaf education, speech pathology, communication disorders, etc. and bookmark the articles that address these concerns. Read the abstracts, and if they appear to fit your needs, request the PDF or full text article. Read the full article, including methodology and statistical analysis sections, as well as results and discussion, and then critically analyze what you have read in order to pinpoint strengths and weaknesses of the research design, and then, based on those strengths and weaknesses, look for additional research that will address such.
Synthesize the knowledge and apply it to various actual situations.
That is the method I use.