Sure, that's an audiogram. It tells you what your threshold of hearing is at a certain set of frequencies. Additionally, sometimes they'll do bone conduction, which can characterize whether your loss is conductive (for example, trouble with the bones in your inner ear) or sensorineural (for example, cochlear damage from noise exposure). But that's just a starting point for fitting a hearing aid -- it's not like a glasses prescription that tells the optometrist exactly how to cut the lens.