The American Speech-Language-Hearing Association (ASHA) is a nationwide organization that guides the field of audiology and ensures people can make informed choices about their hearing health. ASHA influences many of the techniques and guidelines used in common hearing loss tests to determine how well a person can detect sounds. These tests may involve answering questions about hearing difficulties, followed by air or bone conduction exams using headphones, speakers, or vibrating devices to produce sounds. Results are displayed on an audiogram chart showing decibel levels and frequencies to assess any hearing loss.