公开(公告)号：EP4312732A1

公开(公告)日：2024-02-07

申请号：EP23736940.0

申请日：2023-06-09

Applicant: Google LLC

Inventor： Fan, Xiaoran ,  Thormundsson, Trausti

IPC: A61B5/00 ,  A61B5/024 ,  A61B5/08 ,  H04R25/00

公开(公告)号：EP3886085A1

公开(公告)日：2021-09-29

申请号：EP21165298.7

申请日：2021-03-26

Applicant: Google LLC

Inventor： Govind, Kannan ,  Thormundsson, Trausti ,  Timmons, Jayvon ,  Liu, Wensen

IPC: G10K11/178 ,  H04R1/10

Abstract: Active noise cancellation systems and methods include a feedforward path configured to receive a reference signal comprising ambient noise and adaptively generate an anti-noise signal to cancel the ambient noise and comprising an adaptive gain component configured to adaptively adjust a gain of the anti-noise signal, and a logic device configured to determine a leakage profile based on the adaptive gain component. The feedforward path includes a feedforward adaptive filter tuned to generate the anti-noise signal corresponding to the reference signal in accordance with the determined leakage profile. The leakage profile is selected from a plurality of stored leakage profiles that are tuned for a corresponding gain, and which corresponds to an ear coupling condition associated with a fit between the active noise cancellation system and a user. An adaptive transparency filter receives the reference signal and generates an ambient inclusion signal for output to a user.

公开(公告)号：EP4431013A1

公开(公告)日：2024-09-18

申请号：EP24162019.4

申请日：2024-03-07

Applicant: Google LLC

Inventor： Fan, Xiaoran ,  Thormundsson, Trausti ,  Howard, Rich

IPC: A61B5/024 ,  A61B5/38 ,  A61B5/00

CPC classification number: A61B2562/020420130101 ,  A61B5/02405 ,  A61B5/38 ,  A61B5/6817 ,  A61B2560/022320130101

Abstract: Techniques and apparatuses are described that perform heart rate variability detection using a hearable. A hearable 102, such as an earbud, is capable of performing a novel physiological monitoring process termed herein audioplethysmography 110, which is an active acoustic method capable of sensing subtle physiologically-related changes observable at a user's outer and middle ear 108. Instead of relying on other auxiliary sensors, such as optical or electrical sensors, audioplethysmography 110 involves transmitting and receiving acoustic signals to monitor a user's biometrics, including heart rate variability 112 and/or blood pressure 114. In addition to being relatively unobtrusive, some hearables 102 can be configured to support audioplethysmography 110 without the need for additional hardware. As such, the size, cost, and power usage of the hearable 102 can help make health monitoring accessible to a larger group of people and improve the user experience with hearables 102.