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:
Aug. 26, 2025
Filed:
Sep. 26, 2023
Amazon Technologies, Inc., Seattle, WA (US);
Vamshi Krishna Chillara, Quincy, MA (US);
Harsha Inna Kedage Rao, Campbell, CA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
Techniques for proximity-sensing devices to adapt signal parameters of pulsed ultrasonic signals that are used for proximity sensing based on distances between the devices and users. The devices may increase the pulse widths and/or pulse strengths when estimating user distances at longer distance ranges and decrease the pulse widths and/or strengths when estimating user devices at shorter distance ranges. Further, the proximity-sensing devices can increase the amount of time between pulse emissions when the user is walking around a room as compared to when the room is empty. The proximity-sensing devices can also adaptively change the signal parameters to compensate for audio playback effects caused by concurrent emission of audible sound, and to track different types of user motion (e.g., major motion, minor motion, static, etc.).