An electronic device for increasing the strength or gain of an electrical signal.
Amplitude
The physical intensity of a sound. (Subjective impression of “loudness.)
AN
Auditory Neuropathy. (See Auditory Neuropathy Spectrum Disorder.)
AN/AD
Formerly called Auditory Neuropathy/Auditory Dyssynchrony (AN/AD). (See Auditory Neuropathy Spectrum Disorder.)
Analog Hearing Aid
A type of hearing aid that provides amplification by continuous changes in the voltage of the sound signal being amplified. All the older hearing aids worked this way. Modern hearing aids are mostly digital hearing aids.
Anvil
The second of the three bones in the middle ear. Technically called the Incus.