Patents by Inventor Gregory H. Canfield

Gregory H. Canfield 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: 11678109
    Abstract: Offset cartridge microphones are provided that include multiple unidirectional microphone cartridges mounted in an offset geometry. Various desired polar patterns and/or desired steering angles can be formed by processing the audio signals from the multiple cartridges, including a toroidal polar pattern. The offset geometry of the cartridges may include mounting the cartridges so that they are immediately adjacent to one another and so that their center axes are offset from one another. The microphones may have a more consistent on-axis frequency response and may more uniformly form desired polar patterns and/or desired steering angles by reducing the interference and reflections within and between the cartridges.
    Type: Grant
    Filed: April 22, 2021
    Date of Patent: June 13, 2023
    Assignee: Shure Acquisition Holdings, Inc.
    Inventors: Brent Robert Shumard, Gregory H. Canfield, Mark Gilbert
  • Publication number: 20230104602
    Abstract: Systems and methods are disclosed for networked audio automixing using array microphones and an aggregator unit that participate in making a common gating decision to determine which channels to gate on and off. Through the use of such a network of array microphones having the capability to generate submix audio signals and reduced bandwidth metrics, as well as AEC processing capability, array microphone lobe selection can be enhanced while maximizing signal-to-noise ratio, increasing intelligibility, and increasing user satisfaction.
    Type: Application
    Filed: October 4, 2022
    Publication date: April 6, 2023
    Inventor: Gregory H. Canfield
  • Publication number: 20220007104
    Abstract: Offset cartridge microphones are provided that include multiple unidirectional microphone cartridges mounted in an offset geometry. Various desired polar patterns and/or desired steering angles can be formed by processing the audio signals from the multiple cartridges, including a toroidal polar pattern. The offset geometry of the cartridges may include mounting the cartridges so that they are immediately adjacent to one another and so that their center axes are offset from one another. The microphones may have a more consistent on-axis frequency response and may more uniformly form desired polar patterns and/or desired steering angles by reducing the interference and reflections within and between the cartridges.
    Type: Application
    Filed: April 22, 2021
    Publication date: January 6, 2022
    Inventors: Brent Robert Shumard, Gregory H. Canfield, Mark Gilbert
  • Patent number: 10547935
    Abstract: Offset cartridge microphones are provided that include multiple unidirectional microphone cartridges mounted in an offset geometry. Various desired polar patterns and/or desired steering angles can be formed by processing the audio signals from the multiple cartridges, including a toroidal polar pattern. The offset geometry of the cartridges may include mounting the cartridges so that they are immediately adjacent to one another and so that their center axes are offset from one another. The microphones may have a more consistent on-axis frequency response and may more uniformly form desired polar patterns and/or desired steering angles by reducing the interference and reflections within and between the cartridges.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: January 28, 2020
    Assignee: Shure Acquisition Holdings, Inc.
    Inventors: Brent Robert Shumard, Gregory H. Canfield, Mark Gilbert
  • Publication number: 20180310096
    Abstract: Offset cartridge microphones are provided that include multiple unidirectional microphone cartridges mounted in an offset geometry. Various desired polar patterns and/or desired steering angles can be formed by processing the audio signals from the multiple cartridges, including a toroidal polar pattern. The offset geometry of the cartridges may include mounting the cartridges so that they are immediately adjacent to one another and so that their center axes are offset from one another. The microphones may have a more consistent on-axis frequency response and may more uniformly form desired polar patterns and/or desired steering angles by reducing the interference and reflections within and between the cartridges.
    Type: Application
    Filed: June 25, 2018
    Publication date: October 25, 2018
    Inventors: Brent Robert Shumard, Gregory H. Canfield, Mark Gilbert
  • Patent number: 10009684
    Abstract: Offset cartridge microphones are provided that include multiple unidirectional microphone cartridges mounted in an offset geometry. Various desired polar patterns and/or desired steering angles can be formed by processing the audio signals from the multiple cartridges, including a toroidal polar pattern. The offset geometry of the cartridges may include mounting the cartridges so that they are immediately adjacent to one another and so that their center axes are offset from one another. The microphones may have a more consistent on-axis frequency response and may more uniformly form desired polar patterns and/or desired steering angles by reducing the interference and reflections within and between the cartridges.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: June 26, 2018
    Assignee: Shure Acquisition Holdings, Inc.
    Inventors: Brent Robert Shumard, Gregory H. Canfield, Mark Gilbert
  • Publication number: 20170230748
    Abstract: Offset cartridge microphones are provided that include multiple unidirectional microphone cartridges mounted in an offset geometry. Various desired polar patterns and/or desired steering angles can be formed by processing the audio signals from the multiple cartridges, including a toroidal polar pattern. The offset geometry of the cartridges may include mounting the cartridges so that they are immediately adjacent to one another and so that their center axes are offset from one another. The microphones may have a more consistent on-axis frequency response and may more uniformly form desired polar patterns and/or desired steering angles by reducing the interference and reflections within and between the cartridges.
    Type: Application
    Filed: December 19, 2016
    Publication date: August 10, 2017
    Inventors: Brent Robert Shumard, Gregory H. Canfield, Mark Gilbert
  • Patent number: 9554207
    Abstract: Offset cartridge microphones are provided that include multiple unidirectional microphone cartridges mounted in an offset geometry. Various desired polar patterns and/or desired steering angles can be formed by processing the audio signals from the multiple cartridges, including a toroidal polar pattern. The offset geometry of the cartridges may include mounting the cartridges so that they are immediately adjacent to one another and so that their center axes are offset from one another. The microphones may have a more consistent on-axis frequency response and may more uniformly form desired polar patterns and/or desired steering angles by reducing the interference and reflections within and between the cartridges.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: January 24, 2017
    Assignee: Shure Acquisition Holdings, Inc.
    Inventors: Brent Robert Shumard, Gregory H. Canfield, Mark Gilbert
  • Publication number: 20160323667
    Abstract: Offset cartridge microphones are provided that include multiple unidirectional microphone cartridges mounted in an offset geometry. Various desired polar patterns and/or desired steering angles can be formed by processing the audio signals from the multiple cartridges, including a toroidal polar pattern. The offset geometry of the cartridges may include mounting the cartridges so that they are immediately adjacent to one another and so that their center axes are offset from one another. The microphones may have a more consistent on-axis frequency response and may more uniformly form desired polar patterns and/or desired steering angles by reducing the interference and reflections within and between the cartridges.
    Type: Application
    Filed: April 30, 2015
    Publication date: November 3, 2016
    Inventors: Brent Robert Shumard, Gregory H. Canfield, Mark Gilbert
  • Patent number: 8644477
    Abstract: The invention provides a digital automixer system that includes a master processing unit and at least one non-master processing unit that are interconnected. The non-master processing unit obtains a first microphone signal and determines a first basic level measurement and a network submix audio signal. The master processing unit obtains a second microphone signal and determines a second basic level measurement, and obtains the first basic level measurement and the network submix audio signal from the non-master processing unit. The master processing unit further forms a final mix audio signal from the second microphone signal and the network submix audio signal and determines a gating control signal for the digital automixer system. The master processing unit may also delay the second basic level measurement to compensate for a network delay. The invention also provides a digital automixer system that includes a plurality of master processing units.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: February 4, 2014
    Assignee: Shure Acquisition Holdings, Inc.
    Inventors: Mark W. Gilbert, Gregory H. Canfield
  • Publication number: 20070191977
    Abstract: The invention provides a digital automixer system that includes a master processing unit and at least one non-master processing unit that are interconnected. The non-master processing unit obtains a first microphone signal and determines a first basic level measurement and a network submix audio signal. The master processing unit obtains a second microphone signal and determines a second basic level measurement, and obtains the first basic level measurement and the network submix audio signal from the non-master processing unit. The master processing unit further forms a final mix audio signal from the second microphone signal and the network submix audio signal and determines a gating control signal for the digital automixer system. The master processing unit may also delay the second basic level measurement to compensate for a network delay. The invention also provides a digital automixer system that includes a plurality of master processing units.
    Type: Application
    Filed: January 17, 2007
    Publication date: August 16, 2007
    Applicant: Shure Acquisition Holdings Inc.
    Inventors: Mark W. Gilbert, Gregory H. Canfield