Patent ID: 11882405
Assignee: BOSE CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for determining nozzle blockage of a device including a driver, a first microphone, a configuration unit, and a comparison unit, comprising:
outputting, by the driver, an audio signal having a known magnitude and frequency;
determining, by the configuration unit, the device is one of in an ear a user or out of the ear of the user;
comparing, by the comparison unit, a measured driver to first microphone transfer function associated with the audio signal and an expected driver to first microphone transfer function for the audio signal in a frequency range, wherein the frequency range comprises a first range of frequencies between 100 hertz and 1 kilohertz when the device is out of the ear of the user, and wherein the frequency range comprises a second range of frequencies when the device is in the ear of the user, and wherein the second range of frequencies is smaller than the first range of frequencies;
predicting, by the comparison unit, the nozzle is at least partially blocked based, at least in part, on the comparison; and
outputting, by the device, an indication the nozzle is at least partially blocked.