Patents by Inventor Kan Sha

Kan Sha 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).

  • Steering of directional sound beams
    Patent number: 7146011
    Abstract: Apparatus is disclosed for steering a directional audio beam that is self-demodulated from an ultrasound carrier. The apparatus includes means for modulating a carrier signal with an audio signal and means for adjusting the amplitude and phase of at least one of the audio signal and/or the carrier signal to steer the audio beam to a desired direction. The apparatus also includes means for generating an ultrasound beam in the desired direction driven by the modulated carrier signal. The apparatus may include means for weighting the audio and/or carrier signal by a zeroth order Bessel function to synthesize a Bessel distribution source. A corresponding method for steering a directional audio beam is also disclosed. A harmonic generator may be used to generate harmonics of low frequencies in the audio signal. The harmonics may provide (upon demodulation) a psycho-acoustic impression of improved perception of low frequencies.
    Type: Grant
    Filed: February 28, 2004
    Date of Patent: December 5, 2006
    Assignee: Nanyang Technological University
    Inventors: Jun Yang, Woon Seng Gan, Meng Hwa Er, Chee Mun Kelvin Lee, Khim Sia Tan, Yew Hin Liew, Furi Andi Karnapi, Kan Sha, Yi Wang
  • Steering of directional sound beams
    Publication number: 20040264707
    Abstract: Apparatus is disclosed for steering a directional audio beam that is self-demodulated from an ultrasound carrier. The apparatus includes means for modulating a carrier signal with an audio signal and means for adjusting the amplitude and phase of at least one of the audio signal and/or the carrier signal to steer the audio beam to a desired direction. The apparatus also includes means for generating an ultrasound beam in the desired direction driven by the modulated carrier signal. The apparatus may include means for weighting the audio and/or carrier signal by a zeroth order Bessel function to synthesize a Bessel distribution source. A corresponding method for steering a directional audio beam is also disclosed. A harmonic generator may be used to generate harmonics of low frequencies in the audio signal. The harmonics may provide (upon demodulation) a psycho-acoustic impression of improved perception of low frequencies.
    Type: Application
    Filed: February 28, 2004
    Publication date: December 30, 2004
    Inventors: Jun Yang, Woon Seng Gan, Meng Hwa Er, Chee Mun Kelvin Lee, Khim Sia Tan, Yew Hin Liew, Furi Andi Karnapi, Kan Sha, Yi Wang