The external ear (pinna).
Autoimmune Inner Ear Disease (AIED)
Hearing loss or balance problems can arise when the body’s immune system gets out of whack and attacks the inner ear. Normally if you have AIED, you likely also already have another immune system disease. Click here for comprehensive article on AIED.
Automatic Gain Control (AGC)
A form of hearing aid circuitry that automatically adjusts the volume of sound so it remains within a comfortable range for the person wearing the hearing aid.
Automatic Signal Processing (ASP)
Methods of altering the input to analog hearing aids to improve hearing.
Automatic Speech Recognition (ASR)
A computer system that converts the spoken word to text.
Background Noise
Any sound that a person does not wish to hear or that interferes with what they are trying to hear. Background sounds compete with speech and often make it difficult or impossible for a hard of hearing person to understand speech.