Patents by Inventor Xia S. Wang

Xia S. Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9451356
    Abstract: A sound producing apparatus with multi-directivity has two or more speakers to produce music or other types of audio sounds. Each of the speakers can produce audio sounds in a certain direction and at least one speaker is steerable so that its sound propagation direction relative to the others can be changed. Furthermore, one or more speakers can produce audio sounds in an adjustable angular range. One or more of the speakers can be dual-mode speakers, each of which can be operated as a wide-angle speaker or a narrow-angle speaker. With multi-directivity, it is possible to play one type of music in one direction and another type of music in another direction to suit the interests of the audience. The apparatus can be a mobile phone, an audio player, a digital or analog recorder/player, or the like.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: September 20, 2016
    Assignee: Nokia Technologies Oy
    Inventors: Liangfeng Xu, Xia S. Wang, Chenguang Cai, Jani K. Nurminen, Antti O. Salo, Limei Xu, Xuesheng Li, Yi Wang, Min Chen
  • Patent number: 8116508
    Abstract: An apparatus uses a transducer to produce vibration in the ultrasonic frequency range and in the audible frequency range. A membrane or cantilever structure is coupled to the transducer to produce acoustic waves. When the vibration is in the audible frequency range, the membrane structure works like a conventional loudspeaker. When the vibration is in the ultrasonic frequency range, the ultrasonic signal is modulated by audio signal for creating better directivity. The acoustic waves in the ultrasonic frequency range can reproduce directional audible sound due to the nonlinear interaction of ultrasonic waves in air.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: February 14, 2012
    Assignee: Nokia Corporation
    Inventors: Liangfeng Leon Xu, Chenguang Cai, Jani K. Nurminen, Xia S. Wang, Antti O. Salo, Koray Ozcan
  • Publication number: 20100158287
    Abstract: A sound producing apparatus with multi-directivity has two or more speakers to produce music or other types of audio sounds. Each of the speakers can produce audio sounds in a certain direction and at least one speaker is steerable so that its sound propagation direction relative to the others can be changed. Furthermore, one or more speakers can produce audio sounds in an adjustable angular range. One or more of the speakers can be dual-mode speakers, each of which can be operated as a wide-angle speaker or a narrow-angle speaker. With multi-directivity, it is possible to play one type of music in one direction and another type of music in another direction to suit the interests of the audience. The apparatus can be a mobile phone, an audio player, a digital or analog recorder/player, or the like.
    Type: Application
    Filed: December 18, 2008
    Publication date: June 24, 2010
    Inventors: Liangfeng Xu, Xia S. Wang, Chenguang Cai, Jani K. Nurminen, Antti O. Salo, Limei Xu, Xuesheng Li, Yi Wang, Min Chen
  • Publication number: 20100080409
    Abstract: An apparatus uses a transducer to produce vibration in the ultrasonic frequency range and in the audible frequency range. A membrane or cantilever structure is coupled to the transducer to produce acoustic waves. When the vibration is in the audible frequency range, the membrane structure works like a conventional loudspeaker. When the vibration is in the ultrasonic frequency range, the ultrasonic signal is modulated by audio signal for creating better directivity. The acoustic waves in the ultrasonic frequency range can reproduce directional audible sound due to the nonlinear interaction of ultrasonic waves in air.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 1, 2010
    Inventors: Liangfeng Leon Xu, Chenguang Cai, Jani K. Nurminen, Xia S. Wang, Antti O. Salo, Koray Ozcan