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

Claim 8:
9. A wearable audio output device, comprising:
a nozzle, driver, a first microphone, a configuration unit, and a comparison unit, each coupled to at least one processor and a memory, the memory including instructions executable by the at least one processor to cause the wearable audio output device to:
output, by the driver, an audio signal having a known magnitude and frequency;
determining, by the configuration unit, the wearable audio output device is one of in an ear a user or out of the ear of the user;
compare, 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 wearable audio output device is out of the ear of the user, and wherein the frequency range comprises a second range of frequencies when the wearable audio output device is in the ear of the user, and wherein the second range of frequencies is smaller than the first range of frequencies;
predict, by the comparison unit, the nozzle is at least partially blocked based, at least in part, on the comparison; and
output, by the wearable audio output device, an indication the nozzle is at least partially blocked.