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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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Hi allWell, it’s been about 10 years maybe 12 since I quit the AES and I am not a comfortable public speaker anyway so it is with sort of “mixed feelings†I agreed to present again.
For those in Chicagoland (go Bears, my fingers are crossed with only hours to go b4 the game) I would invite you to come if you’re so inclined.
Best,Tom Danley
…………………………………………………………………………………………AUDIO ENGINEERING SOCIETY CHICAGO SECTION MEETING
Please forward this notice to interested friends and colleagues. Members and nonmembers are welcome.
Not a member of the AES? For information about joining, go to http://www.aes.org/info/join.cfm.HTML version available at Chicago Section website soon:
http://www.aes.org/sections/chicago/
PDF version available soon:
http://www.aes.org/sections/chicago/aes_notice_feb2007.pdfDATE: Tuesday, February 13, 2007
TIME: 7:30pm, dinner (optional) at 6:30pm
LOCATION: Holiday Inn North Shore, 5300 Touhy Avenue, Skokie, Illinois (at the northeast corner of Touhy Ave and Niles Center Road)
TOPIC: Time-coherent Loudspeakers
PRESENTER: Tom Danley of Danley Sound LabsDinner (optional) will begin at 6:30pm. Reservation required, contact Treasurer Jon Boley at boley_jon@shure.com or 847-600-8559 by Friday, Feb 9. In appreciation for continued membership, all AES members will receive a $1 discount. Student members will receive a $10 discount. Specify beef sirloin, chicken almondine, or cheese ravioli with pesto sauce. Price is $29 before discount.
ABOUT THE SPEAKER:
Tom Danley has been interested in audio since childhood when his grandfather had a Heathkit mono "hifi" system that he listened to. At age nine, he was helping his grandfather clean up after church service and had climbed into the pipe loft when the organist began to practice, playing deep pedal notes.
While working in audio on and off in the following years, the close up, intense feeling of the pedal notes made an impression that never went away, eventually leading to his development of the Servodrive motor driven subwoofer system in the 1980s during his employment at Intersonics, a NASA experimental flight hardware contractor in Northbrook, Illinois. While at Intersonics, Mr. Danley developed high-intensity transducers and electronic circuitry for acoustic levitation hardware, provided support for space flight hardware, and developed audio transducers, including a full rotary woofer which was licensed and sold as the Phoenix Cyclone.
He has been an invited speaker at the AES and the Acoustical Society of America, has presented at NASA's Jet Propulsion Laboratory and the Committee On Space Research (COSPAR) in The Hague, and has appeared in the movie "Mystery of the Sphinx" with Charlton Heston (demonstrating acoustic levitation). Several years later, Mr. Danley was hired by the same producer to measure the acoustics within the Great Pyramid at Giza for part of a yet to be released move.
Mr. Danley has generated 17 patents for levitation transducers, loudspeaker transducers, horns, control electronics, and electromagnetic levitation. During the last 10 years, his interest has turned more towards full-range loudspeakers and, in particular, how to make multiple frequency ranges combine into one source in time, space, and radiation pattern. A little over two years ago, Danley Sound Labs was formed to sell his speaker designs.
ABOUT THE PRESENTATION:
Multiway loudspeakers normally exhibit several different properties which are undesirable from an ideal, "straight wire to sound" conversion standpoint. The presentation will begin with a discussion of the generation of an imaginary acoustic source, followed by a consideration of how that might be best reproduced in a typical room. Next will be an overview of the obstacles in the way of achieving the desired result using the conventional approach. This will be followed by an overview of the SH-50 Synergy horn, which employs seven drivers in a three-way configuration, but has the radiation pattern of a single, large, constant-directivity horn. Such a configuration is coherent enough in time to reproduce a square wave over a decade range of input frequencies, without the need for digital signal processing. Measured results will be shown. A stereo demonstration will include both music and an example of the "not-so-imaginary" test signal.
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Topic - AES meeting invite - tomservo 06:39:34 02/04/07 (2)
- Re: AES meeting invite - freddyi 08:22:25 02/04/07 (1)
- Re: AES meeting invite - tomservo 13:32:28 02/04/07 (0)
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