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D.B. Keele, Jr.  -- The Official Website
 

A member and fellow ("for contributions to the design and testing of low-frequency loudspeakers") of the Audio Engineering Society, Mr. Keele has presented and published over thirty-five technical papers on loudspeaker design and measurement methods and other related topics, among them the paper for which he won the AES Publication Award, "Low-Frequency Loudspeaker Assessment by Nearfield Sound-Pressure Measurement" (J. Audio Eng. Soc., vol. 22, p. 154 (1974 Apr.). He is a frequent speaker at AES section meetings and workshops, has chaired several AES technical paper sessions, and has been a member of several AES committees including being on the AES review board. Mr. Keele is a past member of the AES Board of Governors and is past Vice President, Central Region USA/Canada of the AES.

Papers and Publications

1. "The Vented Loudspeaker: A Restatement," Presented at the 42nd Convention of the Audio Engineering Society, Preprint No. 842 (L-10), (May 1972).

2. "The Design and Use of a Simple Pseudo Random Pink-Noise Generator," J. Audio Eng. Soc., (Jan./Feb. 1973).

3. "Sensitivity of Thiele's Vented Loudspeaker Enclosure Alignments to Parameter Variations," J. Audio Eng. Soc., (May 1973)

4. "Optimum Horn Mouth Size," Presented at the 46th Convention of the Audio Engineering Society, Preprint No. 933 (B-7), (Sept. 1973).

5. "A Tabular Tuning Method for Vented Enclosures," J. Audio Eng. Soc., (March 1974).

6. "Low-Frequency Loudspeaker Assessment by Nearfield Sound-Pressure Measurement," J. Audio Eng. Soc., (April 1974).

7. "What's So Sacred About Exponential Horns?," Presented at the 51st Convention of the Audio Engineering Society, Preprint No. 1038 (F-3), (May 1975).

8. "A New Set of Sixth-Order Vented-Box Loudspeaker System Alignments," J. Audio Eng. Soc., (June 1975).

9. "Application of Recent Australian Loudspeaker Research to Producible Loudspeaker Systems," Presented at the 1976 IEEE International Conference on Acoustics, Speech, and Signal Processing, (April 1976).

10. "An Efficiency Constant Comparison Between Low-Frequency Horns and Direct-Radiators," Presented at the 54th Convention of the Audio Engineering Society, Preprint No. 1127 (M-1), (May 1976).

11. "Low-Frequency Horn Design Using Thiele/Small Driver Parameters," Presented at the 57th Convention of the Audio Engineering Society, Preprint No. 1250 (K-7), (May 1977).

12. "AWASP: An Acoustic Wave Analysis and Simulation Program," Presented at the 60th Convention of the Audio Engineering Society, Preprint No. 1365 (D-8), (May 1978).

13. "Automated Loudspeaker Polar Response Measurements Under Microcomputer Control," Presented at the 65th Convention of the Audio Engineering Society, Preprint No. 1586 (C7), (Feb. 1980).

14. "Direct Low-Frequency Driver Synthesis from System Specifications," J. Audio Eng. Soc., (Nov. 1982).

15. "Improvements in Monitor Loudspeaker Systems," J. Audio Eng. Soc., (June 1983).

16. "A Microcomputer Program for Central Loudspeaker Array Design," Presented at the 74th Convention of the Audio Engineering Society, Preprint No. 2028, (Oct. 1983).

17. "A Loudspeaker Horn That Covers a Flat Rectangular Area from an Oblique Angle," Presented at the 74th Convention of the Audio Engineering Society, Preprint No. 2052 (D-7), (Oct. 1983).

18. "The Effects of Interaural Crosstalk on Stereo Reproduction and Minimizing Interaural Crosstalk in Nearfield Monitoring by the Use of a Physical Barrier," Presented at the 81st Convention of the Audio Engineering Society, (Nov. 1986).
Part 1: Preprint No. 2420-A (B-10)
Part 2: Preprint No. 2420-B (B-10)

19. Speech Intelligibility Measurements Using TEF Analysis," Presented at the 113th Meeting of the Acoustical Society of America, Paper T5, (May 1987).

20. "Evaluation of Room Speech Transmission Index and Modulation Transfer Function by the Use of Time Delay Spectrometry," Presented at the Audio Engineering Society 6th International Conference, Preprint 2.E, (May 1988).

21. "Effective Performance of Bessel Arrays," J. Audio Eng. Soc., (October 1990).

22. "Measurement of Polarity in Band-Limited Systems," Presented at the 91st Convention of the Audio Engineering Society, Preprint No. 3168 (K-2), (Oct. 1991).

23. "Maximum Efficiency Of Direct-Radiator Loudspeakers," Presented at the 91st Convention of the Audio Engineering Society, Preprint No. 3193 (G-3), (Oct. 1991).

24. "Loudspeaker Production Testing Using the Techron TEF System 20 TDS Analyzer and Host PC," Presented at the 11th International Conference of the Audio Engineering Society, Paper No. 11-032, (May 1992).

25. "The Analytic Impulse and the Energy-Time Curve: The Debate Continues," Presented at the 93rd Convention of the Audio Engineering Society, Preprint No. 3399 (I-5), (Oct. 1992).

26. "Anechoic Chamber Walls: Should They Be Resistive or Reactive at Low Frequencies?," Presented at the 94th Convention of the Audio Engineering Society, Preprint No. 3572 (G2-2), (Mar. 1992).

27. "Log Sampling in Time and Frequency: Preliminary Theory and Application," Presented at the 97th Convention of the Audio Engineering Society, Preprint No. 3935 (K-1), (Nov. 1994).

28. "Time-Frequency Display of Electro-Acoustic Data Using Cycle-Octave Wavelet Transforms," presented at the 99th Convention of the Audio Engineering Society, New York (Oct. 1995).

29. "The Application of Broadband Constant Beamwidth Transducer (CBT) Theory to Loudspeaker Arrays," presented at the 109th Convention of the Audio Engineering Society, Los Angeles (Sept. 2000).

30. "Development of Test Signals for the EIA-426-B Loudspeaker Power Rating Compact Disk," presented at the 111th Convention of the Audio Engineering Society, New York (Sept. 2001).

31. "Suspension Bounce as a Distortion Mechanism in Loudspeakers with a Progressive Stiffness," presented at the 112th Convention of the Audio Engineering Society, Munich (May 2002).

32. "Implementation of Straight-Line and Flat-Panel Constant Beamwidth Transducer (CBT) Loudspeaker Arrays Using Signal Delays," presented at the 113th Convention of the Audio Engineering Society, Los Angeles (Oct. 2002).

33. "The Full-Sphere Sound Field of Constant Beamwidth Transducer (CBT) Loudspeaker Line Arrays," J. Audio Eng. Soc., (July/August 2003).

34. "Practical Implementation of Constant Beamwidth Transducer (CBT) Loudspeaker Circular-Arc Line Arrays," presented at the 115th Convention of the Audio Engineering Society, New York (Oct. 2003).

35 "Comparison of Direct-Radiator Loudspeaker System Nominal Power Efficiency vs. True Efficiency with High-Bl Drivers," presented at the 115th Convention of the Audio Engineering Society, New York (Oct. 2003).

36. "Maximum Efficiency of Compression Drivers," presented at the 117th Convention of the Audio Engineering Society, San Francisco (Oct. 2004).

37. "Interpolating Linear- and Log-Sampled FIR Filtering and Convolution," presented at the 117th Convention of the Audio Engineering Society, San Francisco (Oct. 2004).

38. "Ground-Plane Constant Beamwidth Transducer (CBT) Loudspeaker Circular-Arc Line Arrays," presented at the 119th Convention of the Audio Engineering Society, New York (Oct. 2005).

 


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