Patents Represented by Attorney Craig O. Main

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  • Acoustic data acquisition device
    Patent number: 4041774
    Abstract: Acoustic signals are received, selectively filtered, and digitally processed, e.g., by digitizing an amplitude, the peak of an echo, or the transit time, and the digital data are stored in a memory whose storage cells are associated with particular frequencies. Other acoustical signals are similarly processed but compared with the reference data to obtain a spectral representation of differences or ratios.
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: August 16, 1977
    Assignee: Rockwell International Corporation
    Inventors: Winfred L. Morris, Donald O. Thompson