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Old 4th April 2010, 11:27 AM   #11
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Conclusion:

The temple fence speaker exands pleasure of audio in a way
to make other concepts sound like potatoe compared to shank ?

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Old 4th April 2010, 03:21 PM   #12
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shark? (fin soup).. well it is a wave speaker ! <smile>
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Old 4th April 2010, 03:24 PM   #13
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Google Nachricht
"
Conventional speakers, there is a completely different method, and playing musical instruments and music is the same principle. その意味では、私は新しい方式を発明したわけではなく、先人が既に実現していた英知を改めて拝借しただけな のです。 In that sense, but I do not invent a new method is only borrowed once again the wisdom our ancestors have already been achieved.

音の特徴としては、原理が同じである楽器と同様の特徴があります。 The sound features are characterized by similar principles are the same instrument. まず、音の指向性がほとんどなく、 360度どの位置から聞いてもほぼ同質の音が聞こえます。 First, almost no directivity of the sound, hear the same quality we've heard from almost any position 360 degrees. 2点目は、従来のスピーカーよりも音圧が少ない(体感する音の大きさの割には音圧が少ない)点で す。 Second, the less sound pressure than conventional speakers (for one's perceptions of loudness is less sound pressure) point. 音圧の少ない音は長時間聞いても疲れ難いメリットがあります。 Low-noise sound pressure is hard to feel any better to hear the benefits a long time. この2点は我が家の試作機をお聞きいただいた方には明確に実感いただけたかと思います。 Those two points is a prototype of the home you hear or think clearly felt Itadaketa."
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File Type: jpg 081015_055.jpg (295.4 KB, 574 views)
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Last edited by LineArray; 4th April 2010 at 03:34 PM.
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Old 4th April 2010, 04:57 PM   #14
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When i think about the designs of Mr. Teragaki i assume, most
of his panels might operate in whole body motion at least up
to midbass range maybe even further up.

Above that they seemed to be optimized for modal breakup as
smooth as possible. The "Terra SP 3000" style panel should be
suffciently rigid for pistonic motion in the bass range, especially
when driven at multiple points or ring shaped areas, which i cannot
see from the picture.

The "Terra SP 1000" seems to rely on this kind of transducer solely.
Maybe as a purist he wants his panel to cover the whole audio range,
without crossing to a subwoofer, although i cannot see the system
working any different in the bass range than a conventional driver.

Just my guess.
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Last edited by LineArray; 4th April 2010 at 05:04 PM.
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Old 4th April 2010, 05:27 PM   #15
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While the stiffness members support whole body motion in the bass,
they may contribute to anisotropy of the panel (different propagation
velocity of bending waves due to travelling direction) and thereby to
diffusivity and modal overlap.

The details will be hidden in the materials glues and treatment ...

He uses a combination of rigidity introduced by overall panel shape (curved)
and and by additional stiffness members.
He uses a combination of anisotropy provided on the macroscopic scale
- by same stiffeners (maybe with damping component)-
and the microscopic scale contributed by the material used, which are
shrinked differently on the zones of the panel.

Just my guesses ... but be sure, that guy has done his homework.
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Old 4th April 2010, 05:28 PM   #16
tinitus is online now tinitus  Europe
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BIG diy woofer for OB

Glad to see I wasnt completely wrong

Impressive pictures you have found
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File Type: jpg Big dipole woofer.JPG (21.7 KB, 567 views)
File Type: jpg OB RUBANOIDE setup.JPG (27.5 KB, 550 views)
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Old 4th April 2010, 05:40 PM   #17
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Hi Tinitus,

i cannot remember anyone to assume you being "wrong" ...

Kind Regards
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Old 5th April 2010, 08:35 AM   #18
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Quote:
Originally Posted by tinitus View Post
As i can see you have proposed a large "Rubanoid" for your satellites.

The "Lineaum" tweeter and its descendants are bending wave transducer too.

A later concept is the "Airfoil" which is based on the same principle of
driving a curved foil at a line or edge, thereby exciting bending waves
propagating along the foil, which causes radiation of sound.

Like in every bending wave transducer the art is to damp the bending waves
to the right amount to reduce reflexions from the suspension, which would cause
uncontroled resonances.

6moons.com - industry features: AERO - Linaeum reborn?

Airfoil Loud Speakers

http://www.zenn.com.sg/Linaeum_Mid.JPG
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Last edited by LineArray; 5th April 2010 at 08:40 AM.
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Old 5th April 2010, 08:58 AM   #19
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For those who want to visualize vibrational modes of
circular and rectangular membranes, here is a link to
the applets of Paul Falstad:

circular membrane:
http://www.falstad.com/circosc/

rectangular membrane:
http://www.falstad.com/membrane/

Have fun !
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Last edited by LineArray; 5th April 2010 at 09:02 AM.
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Old 5th April 2010, 07:49 PM   #20
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Just an excursion to the vibrational esthetics of musical instruments:

http://www.acoustics.org/press/140th/rossing.htm


For every mode of the crash cymbal shown on that
pictures there will be a unique directional pattern of
sound radiation.
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Last edited by LineArray; 5th April 2010 at 07:58 PM.
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