公开(公告)号：US11729538B2

公开(公告)日：2023-08-15

申请号：US17685480

申请日：2022-03-03

Applicant: Waymo LLC

Inventor： Choon Ping Chng ,  Cheng-Han Wu ,  Jun Hou ,  Xuan Zhong

IPC: H04R1/04 ,  H04R1/22 ,  H04R1/08

CPC classification number: H04R1/04 ,  H04R1/08 ,  H04R1/222 ,  H04R2499/13

Abstract: A sensor module comprising a housing defining an internal cavity, the housing including an aperture, at least one microphone positioned in the internal cavity spaced from the aperture, a first barrier proximate the aperture, and a second barrier positioned between the at least one microphone and the first barrier.

公开(公告)号：US11303980B2

公开(公告)日：2022-04-12

申请号：US16939647

申请日：2020-07-27

Applicant: Waymo LLC

Inventor： Choon Ping Chng ,  Cheng-Han Wu ,  Jun Hou ,  Xuan Zhong

IPC: H04R1/04 ,  H04R1/22 ,  H04R1/08

Abstract: A sensor module comprising a housing defining an internal cavity, the housing including an aperture, at least one microphone positioned in the internal cavity spaced from the aperture, a first barrier proximate the aperture, and a second barrier positioned between the at least one microphone and the first barrier.

公开(公告)号：US20220191604A1

公开(公告)日：2022-06-16

申请号：US17685480

申请日：2022-03-03

Applicant: Waymo LLC

Inventor： Choon Ping Chng ,  Cheng-Han Wu ,  Jun Hou ,  Xuan Zhong

IPC: H04R1/04 ,  H04R1/22 ,  H04R1/08

Abstract: A sensor module comprising a housing defining an internal cavity, the housing including an aperture, at least one microphone positioned in the internal cavity spaced from the aperture, a first barrier proximate the aperture, and a second barrier positioned between the at least one microphone and the first barrier.

公开(公告)号：US20220030341A1

公开(公告)日：2022-01-27

申请号：US16939647

申请日：2020-07-27

Applicant: Waymo LLC

Inventor： Choon Ping Chng ,  Cheng-Han Wu ,  Jun Hou ,  Xuan Zhong

IPC: H04R1/04 ,  H04R1/08 ,  H04R1/22

Abstract: A sensor module comprising a housing defining an internal cavity, the housing including an aperture, at least one microphone positioned in the internal cavity spaced from the aperture, a first barrier proximate the aperture, and a second barrier positioned between the at least one microphone and the first barrier.

公开(公告)号：US20230100827A1

公开(公告)日：2023-03-30

申请号：US17449540

申请日：2021-09-30

Applicant: Waymo LLC

Inventor： Xin Zhou ,  Xuan Zhong ,  Courtney McCool

IPC: B60W40/06 ,  H04R1/08 ,  H04R1/02 ,  B60W60/00 ,  B60R19/54

Abstract: It is advantageous for a vehicle to detect road wetness or related environmental conditions. This is particularly true for self-driving vehicles, which can then adjust the manner of automated operation of the vehicle to increase safety by reducing speed, braking earlier, adjusting internal estimates of road traction parameters, or adjusting autonomous operation in some other manner. It is difficult to directly measure road wetness (e.g., using spectroscopy or other methods directed at the road surface), however, it is possible to indirectly estimate road wetness based on road noise audio signals detected via one or more microphones disposed on the vehicle. The location of the microphones, the type of post-processing applied to the audio signals, or other factors can be adapted to increase the useful road wetness-related content of such audio signals while reducing the presence of engine noise, road noise, or other confounding signals.