Patents by Inventor David A. Prophit

David A. Prophit 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: 4567959
    Abstract: A limited space, small enclosure bass speaker module is shown, for providing an enhanced perception and sound level of bass frequencies. An acoustic transducer is mounted on an end of a closed elongated, cylindrical member of rigid construction. The cylinder provides acoustic loading of the transducer, and can be either an acoustic suspension or a bass reflex form; the bass reflex form has the bass reflex port located coplanar to the transducer. The resulting structure is a an oriented point source. The module is then acoustically coupled to its surroundings by being mounted so that the transducer face is in a corner. The result is to convert the surrounding environment into one element of a horn loaded speaker, producing an enhanced bass effect.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: February 4, 1986
    Inventor: David A. Prophit