The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2026
Filed:
Feb. 12, 2024
Apple Inc., Cupertino, CA (US);
Hanchi Chen, Mountain View, CA (US);
Jianjun He, San Jose, CA (US);
Vladan Bajic, San Francisco, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A wearable device may include a microphone configured to generate a microphone signal, a speaker configured to be driven by an audio signal, and one or more processors configured to process the microphone signal to determine an amount of ultrasound in the microphone signal; determine, based on the amount of ultrasound, a parameter to control a digital filter that attenuates energy in the microphone signal, in which the digital filter attenuates more when the amount of ultrasound is increasing and less when the amount of ultrasound is decreasing; and apply the digital filter to the microphone signal to generate a reference audio signal that is then processed in a path that produces the audio signal to drive the speaker.