Hearing aid specialists need knowledge in the following areas:

• Customer and Personal Service: Providing special services to customers based on their needs.
• Sales and Marketing: The methods for selling products and services.
• Therapy and Counseling: The mental or physical problems and methods for treatment.
• Medicine and Dentistry: Injuries and illnesses and plans for treatment.
• Computers and Electronics: Computer hardware and software.
• Clerical: General office work such as filling and storing information.
• English Language: The meaning and use of the English language.
• Administration and Management: How to run a business or group.
• Economics and Accounting: Banking and business.
• Psychology: People, their actions, and mental processes and how to treat problems.
• Engineering and Technology: How to use computers and rules of engineering to design and produce goods and services.
• Education and Training: The methods of teaching and learning.
• Personnel and Human Resources: The policies to hire and retain employees.