Hi all,
I would first like to apologize that this is totally unrelated to Pd. However I figured that this list is the most likely place to find an answer among the communities I subscribe to.
Years ago I used some driver units to playback super low frequencies, down from the inaudible up to probably 100Hz at most. It was more like a chunk of steel designed to mount on any surface expecting it to resonate. These units were also very inexpensive and ran for 10s or 20s of US dollars I think.
Today when I search for driver units of such kinds, all I can find are ones which look more like speaker cones and not exactly what I recall.
Does anyone know of where to look, or keywords pointing to such products? and hopefully places I can purchase them online?
BTW, of course the goal is to drive some of these using PD, inspired by Roman's work using solenoids :)
-- David Shimamoto
Hallo, PSPunch hat gesagt: // PSPunch wrote:
I would first like to apologize that this is totally unrelated to Pd. However I figured that this list is the most likely place to find an answer among the communities I subscribe to.
There also is the pd-ot list, where you can reach many of the pd-list subscribers in off-topic questions.
Sorry, can't help with your question.
Ciao
Frank Barknecht _ ______footils.org__
i can't help you either, but i once saw photos of a system that could play the infamous 'brown note' of 7 hz . it was massive, and the guy had dug trenches in his basement to do it.
dear bass-fetishists,
There are some available from pollin.de that we used, order number 630 104 costing 5 euros per piece. not the best in the world, but quite okay......
tim
On 08/01/2008, at 1:44 PM, hard off wrote:
i can't help you either, but i once saw photos of a system that could play the infamous 'brown note' of 7 hz . it was massive, and the guy had dug trenches in his basement to do it.
PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/ listinfo/pd-list
I would love to get my hands on one of these: http://www.eminent-tech.com/randd2.html
Thigpen rotary vane loudspeakers are like a sub-subwoofer, because they have a low-pass characteristic rather than band-pass. It's the only loudspeaker that goes all the way down to 0 Hz.
Chuck
On Tue, 8 Jan 2008 09:02:22 -0600 "Charles Henry" czhenry@gmail.com wrote:
It's the only loudspeaker that goes all the way down to 0 Hz.
Yeah... but this one goes down to -1 ;)
Search for "bass shaker" or "bass driver". Aura is one of the main brand names for these. These are bass transducers designed for home theaters and car audio systems. The idea is to put them in the seat and the bass literally kicks you in the ass. I used them to resonate a huge structure of construction scaffolding once. They are usually approx EUR 25.
http://en.wikipedia.org/wiki/Tactile_transducer
Difference between these and solenoids is that you drive these directly with audio, meaning you need a multichannel soundcard to drive several. Solenoids get driven by DC voltage via a transistor (which in Roman's case is driven by a microconotroller/Arduino), so the cost per channel is much lower.
best, d.
PSPunch wrote:
Hi all,
I would first like to apologize that this is totally unrelated to Pd. However I figured that this list is the most likely place to find an answer among the communities I subscribe to.
Years ago I used some driver units to playback super low frequencies, down from the inaudible up to probably 100Hz at most. It was more like a chunk of steel designed to mount on any surface expecting it to resonate. These units were also very inexpensive and ran for 10s or 20s of US dollars I think.
Today when I search for driver units of such kinds, all I can find are ones which look more like speaker cones and not exactly what I recall.
Does anyone know of where to look, or keywords pointing to such products? and hopefully places I can purchase them online?
BTW, of course the goal is to drive some of these using PD, inspired by Roman's work using solenoids :)
-- David Shimamoto
PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
They might have been electrostatic blocks? Basically a big piezo crystal that expands, as used in some camera focus controls. You need a well regulated high voltage to operate them though. I've never seen anything like that as a bass driver. For ideas to experiment you could check out servo operated bass drivers and the acoustic wave cannon design.
http://www.servodrive.com/basstech7.html http://cardhouse.com/x09/wave.htm
On Tue, 08 Jan 2008 10:55:50 +0900 PSPunch shima@pspunch.com wrote:
Hi all,
I would first like to apologize that this is totally unrelated to Pd. However I figured that this list is the most likely place to find an answer among the communities I subscribe to.
Years ago I used some driver units to playback super low frequencies, down from the inaudible up to probably 100Hz at most. It was more like a chunk of steel designed to mount on any surface expecting it to resonate. These units were also very inexpensive and ran for 10s or 20s of US dollars I think.
Today when I search for driver units of such kinds, all I can find are ones which look more like speaker cones and not exactly what I recall.
Does anyone know of where to look, or keywords pointing to such products? and hopefully places I can purchase them online?
BTW, of course the goal is to drive some of these using PD, inspired by Roman's work using solenoids :)
-- David Shimamoto
PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Hey Andy,
bit more than ten bucks a pop, those.... ;-)
d.
Andy Farnell wrote:
For ideas to experiment you could check out servo operated bass drivers and the acoustic wave cannon design.
http://www.servodrive.com/basstech7.html http://cardhouse.com/x09/wave.htm
On Tue, 08 Jan 2008 14:19:26 +0100 Derek Holzer derek@umatic.nl wrote:
Hey Andy,
bit more than ten bucks a pop, those.... ;-)
Er.. yup! :)
Interesting operational principles though...
I wonder what else would give you high power low frequency control, maybe pnneumatics ...
d.
Andy Farnell wrote:
For ideas to experiment you could check out servo operated bass drivers and the acoustic wave cannon design.
http://www.servodrive.com/basstech7.html http://cardhouse.com/x09/wave.htm
-- derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista ---Oblique Strategy # 29: "Change nothing and continue with immaculate consistency"
On Tue, 2008-01-08 at 10:55 +0900, PSPunch wrote:
Years ago I used some driver units to playback super low frequencies, down from the inaudible up to probably 100Hz at most. It was more like a chunk of steel designed to mount on any surface expecting it to resonate. These units were also very inexpensive and ran for 10s or 20s of US dollars I think.
are you talking about transducers? speakers that are designed to be mounted on something in order to shake that something?
something like this? http://www.visaton.com/en/car_hifi/koerperschall/828.html
roman
Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de
Yes, "transducers" was the term I was looking for!
As a matter of fact, running through the photos at sites I was given, I think the lower end items of AURA's "bass shaker"s are exactly what I've used in the past.
Thank you all for the references.
Frank, thanks for the note on PD-ot. I can't believe I've been missing out on it all of these months. On my way to subscribe now.
-- David Shimamoto
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Andy Farnell -
Charles Henry -
Derek Holzer -
Frank Barknecht -
hard off -
PSPunch -
Roman Haefeli -
Tim Boykett