None of the above: Other
D.B. (also known as Don) Keele Jr. is best known for his work with EV in the 1970s. While with EV, Mr. Keele designed the constant directivity high frequency horns for EV's "HR" series speakers. These horns were created so as to provide a constant sound pressure level (SPL) at all frequencies within the coverage area of the horn. His work on loudspeaker measurements earned him the 2001 TEF Richard C. Heyser Award and he was awarded a Scientific and Technical Academy Award from the Academy of Motion Picture Arts and Sciences for his work on Cinema constant-directivity loudspeakers.