Patent ID: 9226082
Filing Date: 2015-12-29
Classification: H04R

Abstract:
1. A hearing aid comprising a receiver and at least one first microphone for transforming an acoustical signal surrounding a hearing aid user into an electrical signal, said hearing aid comprising an ear plug part adapted for fitting tightly in the ear canal of a hearing aid user such that an inner volume is formed in the inner part of the ear canal between the ear plug part and the ear drum of the hearing aid user, said ear plug part comprising a second microphone adapted for transforming an acoustical signal in said volume into an electrical signal, an estimator for estimating the effective size of the air leak between said inner volume and the surroundings based on the acoustical signal detected in said volume by said second microphone from a predetermined acoustical signal at a frequency below 1000 Hz, generated by said receiver, and a notifier for notifying the hearing aid user if the size of said air leak is outside a predefined range.