What is an Audiogram?
An audiogram is a visual representation of a person’s hearing ability. It charts the softest sounds a person can hear at various frequencies, measured in decibels (dB) and Hertz (Hz). Audiograms are used by audiologists to diagnose hearing loss and recommend appropriate interventions, such as hearing aids or assistive devices.
How does an Audiogram Work?
An audiogram has two types of tests:
- Air Conduction: This test evaluates sound traveling through the entire ear system—outer, middle, and inner ear—using headphones or ear inserts.
- Bone Conduction: This test bypasses the outer and middle ear to assess the inner ear's function. A bone conduction oscillator on a headband delivers sound directly to the inner ear, helping to identify the type and location of hearing loss.
Types of Hearing Loss
Refer to the HKNC resource, “Types of Hearing Loss,” for more details on the following categories:
- Sensorineural Hearing Loss
- Conductive Hearing Loss
- Mixed Hearing Loss
- Central Auditory Processing Disorder (CAPD)