公开(公告)号：US20190268690A1

公开(公告)日：2019-08-29

申请号：US15904628

申请日：2018-02-26

Applicant: GM Global Technology Operations LLC

Inventor： Ian R. Singer ,  Dargham Alyassiry ,  Runhong Deng

IPC: H04R1/28 ,  H04R1/02 ,  H04R1/40 ,  H04R9/06

Abstract: A vibration reduction assembly includes a mass and an actuator. The mass is configured to be attached to a rear plate or a frame of a speaker in a manner that allows the mass to move along a longitudinal axis of a pole of the rear plate. The mass is sized to yield a force that is equal in magnitude and opposite in direction relative to a force generated by moving components in the speaker and acoustic pressure of the speaker. In one example, the actuator is configured to move the mass in phase with movement of a voice coil of the speaker along the longitudinal axis of the pole and in an opposite direction than the voice coil movement. In another example, the actuator is configured to move the mass out of phase with the voice coil movement and in the same direction as the voice coil movement.

公开(公告)号：US10609481B2

公开(公告)日：2020-03-31

申请号：US16003656

申请日：2018-06-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Ian R. Singer ,  Richard A. Close ,  Runhong Deng

IPC: H04R3/00 ,  H02H3/08

Abstract: One general aspect includes a method for electric overcurrent protection, the method including: calculating, via a controller, a system electric current sum; receiving, via the controller, audio production electric current data; comparing, via the controller, the system electric current sum and audio production electric current data; and when the audio production electric current data exceeds the system electric current sum, invoke a fail-soft action configured to prevent electric overcurrent from being delivered to an audio speaker.

公开(公告)号：US10382858B1

公开(公告)日：2019-08-13

申请号：US15904628

申请日：2018-02-26

Applicant: GM Global Technology Operations LLC

Inventor： Ian R. Singer ,  Dargham Alyassiry ,  Runhong Deng

IPC: H04R1/28 ,  H04R9/06 ,  H04R1/40 ,  H04R1/02

Abstract: A vibration reduction assembly includes a mass and an actuator. The mass is configured to be attached to a rear plate or a frame of a speaker in a manner that allows the mass to move along a longitudinal axis of a pole of the rear plate. The mass is sized to yield a force that is equal in magnitude and opposite in direction relative to a force generated by moving components in the speaker and acoustic pressure of the speaker. In one example, the actuator is configured to move the mass in phase with movement of a voice coil of the speaker along the longitudinal axis of the pole and in an opposite direction than the voice coil movement. In another example, the actuator is configured to move the mass out of phase with the voice coil movement and in the same direction as the voice coil movement.

公开(公告)号：US09755772B1

公开(公告)日：2017-09-05

申请号：US15063178

申请日：2016-03-07

Applicant: GM Global Technology Operations LLC

Inventor： Nahel Eshaq ,  David S. Cheney ,  Runhong Deng

IPC: H04H20/86 ,  H04H20/71 ,  H04B1/3822

CPC classification number: H04H20/86 ,  H04B1/3822 ,  H04H20/62 ,  H04H20/71 ,  H04H40/18

Abstract: An antenna system for a vehicle that includes at least one radio frequency (RF) antenna that receives both a digital audio broadcasting (DAB) RF broadcast and a frequency modulation (FM) RF broadcast. A single amplifier coupled to one or more antennas is used to process both the DAB and FM broadcasts.