Patent ID: 9451368
Filing Date: 2016-09-20
CPC Classification: H04R

Claim Text:
1. A hearing aid, comprising: a sensor that receives ambient sound from around a patient; and a driver that stimulates the anatomy of the patient; wherein the hearing aid has an operational mode in which the driver stimulates the anatomy of the patient in response to the sound received at the sensor; wherein the hearing aid has a test mode in which a test frequency is stepped through a predetermined range of frequencies; and wherein at each test frequency, the driver is driven with a sinusoidal driver signal at the test frequency, the sensor detects a sinusoidal sensor signal at the test frequency, and a comparison of the sensor signal to the driver signal produces an amplitude and a phase for the test frequency, wherein the sinusoidal driver signal and the sinusoidal sensor signal are sampled at intervals that are spaced apart by one-fourth of an oscillation period at the test frequency.