Patent ID: 7936888

Claim:
An equalization method based on audiogram using an equalization apparatus including a sound source memory calibrated at a constant step of dBHL and storing sound source data having a plurality of frequency bands for one dBHL, a sound chip, a controller calling the sound source data, a speaker, and an equalizer, the equalization method comprising the steps of: a) outputting a reference sound having reference frequency and intensity for approximate assumption of auditory threshold; b) determining a start sound corresponding to an assumed value of the auditory threshold while calling a sound having intensity different from a prior sound at a sound source memory depending on whether an answering signal of a user to the reference sound is received; c) outputting a first test sound whose intensity is controlled at a value set prior to the start sound, having the reference frequency; d) calling a test sound having intensity and frequency different from those of the prior sound at the sound source memory depending on whether the answering signal of the user to the test sound is received; e) storing reception data on the answering signal of the user to the test sound; f) repeating the steps d) to e); g) determining the auditory threshold per previously set frequency band using the reception data of the answering signal; and h) performing equalization depending on the determined auditory threshold per frequency, wherein the controller calls a sound source while randomly changing the frequency depending on a predetermined Random Bekesy tracing algorithm.