New type drive unit??? (Off Topic)

by GC, Monday, August 01, 2005, 17:43 (4551 days ago)

Hi All,

I stumbled into a picture at eBay showing a very strange looking Lowther/Stamm drive unit.

[image]

Did anybody hear this driver and could fill me in about the major advantage of this "star shaped cutted whizzer"?

Is this for real?

Ciao,

Bert

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New type drive unit???

by GC, Tuesday, August 02, 2005, 08:29 (4551 days ago) @ GC

Helo Bert,

I must admit that I see this driwer the first time. I was checking (on internet) all Lowther applications and tips recently and this type of driwer must slip away:-( .
Ciao,
Gasper.

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New type drive unit???

by GC, Monday, August 08, 2005, 05:21 (4545 days ago) @ GC

Hi Bert-

This may be a quantum leap, but the picture reminds me of the serrated roll shape described below (may be a possible addition to a full range driver!):

United States Patent 6334505
Optimum edges for speakers and musical instruments
Issued on January 1, 2002

Inventor:
Ming-Chiang Li
Address: 11415 Bayard Dr., Mitchellville, MD 20721
No. of patents: 9
Last patent issue date: 2002-01-01

Abstract:
The invention presents a design of optimum edges for antennas of loudspeakers, microphones, hydro-speakers, hydro-phones, brass and wind instruments, and ultrasonic transducers.

These edges have a serrated-roll shape, and enhance the acoustical field strength uniformity. Loudspeakers, hydro-speakers, and ultrasonic transducers will become more effective in radiating acoustical power.

The quality of these apparatuses are enriched. The musical tone emitted by loudspeakers, brass and wind instruments becomes more smooth, mellow, rich, clean, and elegant.


He presented his findings to The Acoustical Society of America:
Optimum edges for speakers and musical instruments
Ming-Chiang Li

doi:10.1121/1.1500877
PACS: 43.20.El

happy listening,
Hans

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New type drive unit???

by GC, Monday, August 08, 2005, 11:02 (4545 days ago) @ GC

Hi Hans,

United States Patent 6334505
Optimum edges for speakers and musical instruments
Issued on January 1, 2002

Thanks, I will look it up.

Ciao,

Bert

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