Patent ID: 9728179
Date: 2017-08-08
CPC Classifications: G10K,H04R

Claim:
1. A method of calibrating an earphone, the method comprising: securing an active noise canceling (ANC) earphone to a calibration fixture, the calibration fixture including an ear model configured to support the ANC earphone, the ear model having an ear canal configured to anatomically resemble a human ear canal and a concha configured to anatomically resemble a human ear concha, the ear canal extending from the concha to an inner end of the ear canal; generating, with the ANC earphone, a first audio signal based on a first reference tone; determining a characteristic of the first audio signal; comparing the characteristic of the first audio signal to a previously determined reference characteristic; and adjusting a gain value of the ANC earphone based on the comparing, in which the determining the characteristic of the first audio signal includes: