公开(公告)号：US10750302B1

公开(公告)日：2020-08-18

申请号：US15276649

申请日：2016-09-26

Applicant: AMAZON TECHNOLOGIES, INC.

Inventor： Xuan Zhong ,  Chia-Jean Wang ,  Bozhao Tan ,  Han Zhang ,  Jianchun Dong ,  Geng Ye

IPC: H04R29/00 ,  H04R1/02 ,  G06F3/16 ,  H04R17/00

Abstract: A user interface for a head-mounted wearable device provides many functions to a user. Information about whether the device is being worn (donned) or not worn (doffed) may be acquired in several ways. Force sensing resistors in the device may provide output indicative of the pressure associated with wearing the device. Output from a bone conduction (BC) microphone may be analyzed to determine if the device is in use. Piezoelectric BC speakers typically used to present audio output to a wearer provide changes in voltage corresponding to a change in pressure associated with wearing the device. A BC speaker may emit a signal that is detected by the BC microphone, with changes in the signal strength being used to determine if the device is donned or doffed.

公开(公告)号：US11089416B1

公开(公告)日：2021-08-10

申请号：US16923423

申请日：2020-07-08

Applicant: AMAZON TECHNOLOGIES, INC.

Inventor： Xuan Zhong ,  Chia-Jean Wang ,  Bozhao Tan ,  Han Zhang ,  Jianchun Dong ,  Geng Ye

IPC: H04R29/00 ,  H04R1/02 ,  G06F3/16 ,  H04R17/00

Abstract: A head-mounted wearable device provides many functions to a user. The functions may be provided based in part on whether the device is being worn (donned) or not worn (doffed). Force sensing resistors in the device provide output indicative of forces associated with wearing the device. A time series of values indicative of the magnitude of a force may be determined. An increase or decrease in force values measured at different times may indicate that the device has been donned or doffed, respectively. If a subsequent force value does not differ substantially from a previous force value, this may indicate that the device has remained donned or doffed.

公开(公告)号：US10535364B1

公开(公告)日：2020-01-14

申请号：US15260220

申请日：2016-09-08

Applicant: AMAZON TECHNOLOGIES, INC.

Inventor： Xuan Zhong ,  Bozhao Tan ,  Jianchun Dong ,  Chia-Jean Wang

IPC: G10L25/78 ,  G10L25/93 ,  G10L25/84 ,  G10L25/09 ,  G10L21/0216

Abstract: A head-mounted wearable device incorporates a transducer that operates as a bone conduction (BC) microphone. Vibrations from a user's speech are transferred through the head of the user to the BC microphone. An air conduction (AC) microphone detects sound transferred via air. Signals from the BC microphone and the AC microphone are compared to determine if a common signal is present in both. For example, both signals may have a cross-correlation that exceeds a threshold value. Based on the comparison, voice activity data is generated that indicates the user wearing the device is speaking.

公开(公告)号：US10699691B1

公开(公告)日：2020-06-30

申请号：US15637532

申请日：2017-06-29

Applicant: Amazon Technologies, Inc.

Inventor： Geng Ye ,  Zhen Xu ,  Haoxing Zhang ,  Bozhao Tan ,  Xuan Zhong ,  Jianchun Dong

IPC: G10K11/178 ,  H04R3/00 ,  G02B27/01 ,  G02C5/14 ,  G02C11/00 ,  G02C5/22

Abstract: A head-mounted wearable device (HMWD) may incorporate bone conduction speakers (BCS) to generate audio output that is perceptible to a wearer. During operation, vibrations of the BCS may produce sound in the surrounding air that is perceptible to bystanders. An active noise cancellation module monitors the output and generates cancellation audio that is out of phase with the sound leaked by the BCS. An air conduction speaker emits the cancellation audio, producing destructive acoustic interference to the leaked sound. As a result, the user of the HMWD is able to hear audio clearly while bystanders are not.

公开(公告)号：US10547930B1

公开(公告)日：2020-01-28

申请号：US15385511

申请日：2016-12-20

Applicant: AMAZON TECHNOLOGIES, INC.

Inventor： Xuan Zhong ,  Jianchun Dong ,  Bozhao Tan ,  Han Zhang

IPC: H03G3/20 ,  H04R1/10 ,  H04R3/04 ,  G10L25/84 ,  G02B27/01 ,  H03G3/32 ,  G06F3/041

Abstract: A head-mounted wearable device (HMWD) may incorporate bone conduction speakers (BCS) to generate audio output that is perceptible to a wearer. Due to the mechanical connection between the BCS and the rest of the device, when the output amplitude of the BCSs is too great, the air-conducted audio “leaks” and may be heard by other people. This leakage may result in eavesdropping by, or generate a nuisance to, those other people. The noise level in the environment around the HMWD is determined and used to dynamically adjust the amplitude of the audio output generated by the BCS. This adjustment improves the comfort and intelligibility of the audio output to the wearer while minimizing audio leakage to the surrounding environment.