MAGNITUDE AND PHASE CORRECTION OF A HEARING DEVICE

摘要

A method for correcting magnitude and phase distortion in open ear hearing devices includes determining the insertion effect of the hearing device (12) substantially at the ear drum (11) when in the ear. Both the magnitude and phase response of the complex insertion transfer function (ITF) are corrected when the transfer function to the ear drum substantially matches the transfer function without the hearing device in place.

主权项

1. A method of correcting magnitude and phase distortion in hearing devices wherein at least a portion of the hearing device is inserted in the ear when worn by the user, comprising
presenting for measurements the head of an acoustic manikin or live person with an ear having an ear canal and ear drum position at the end of the ear canal, measuring the complex head related transfer function (HRTF) of the unobstructed ear canal, said measurement being made substantially at the position of the ear drum, placing a hearing device in the ear canal, measuring the complex insertion transfer function (ITF) of the ear canal with the hearing device in the ear canal, said measurement being made substantially at the position of the ear drum, correcting the insertion effect by correcting both the magnitude and phase response of the ITF to produce resultant complex aided transfer function (ATF), wherein the resultant AFT is substantially the same as the measured HRTF.