Patents by Inventor Larry A. Spence

Larry A. Spence 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).

  • Oral cavity size controlled musical sound apparatus and method
    Patent number: RE29010
    Abstract: .Iadd.In a method and apparatus for controlling musical sounds there is provided a housing with an inner cavity and a mouthpiece forming an air channel and a loudspeaker cone for vibrating the air in the inner cavity for introducing sound energy into the oral cavity of a player via the mouthpiece. The sound energy is acoustically monitored by a microphone which produces an output control signal that is used to control the pitch of an electric sound generator in relation to the size of the oral cavity. .Iaddend. Means forming an air channel is connected between the output of .[.a.]. .Iadd.the .Iaddend.loudspeaker and the input of .[.a.]. .Iadd.the .Iaddend.microphone. The output of the microphone is amplified by means of an amplifier, the output of the amplifier being fed to the speaker, an acoustical feedback path thus being formed between the speaker and the microphone.
    Type: Grant
    Filed: February 21, 1975
    Date of Patent: October 26, 1976
    Inventor: Larry A. Spence