DISSOCIATING WATER, A KEELY Project

[rMuD]

The problem with digital sound reproduction or creation is that the signal is a square wave, no matter what sound is produced . Look into it,  you will find the digital can not replicate a sound in its pure form. There will always be the square wave breaking up your sound pattern.

This is the nature of digital and its 1s and 0s or on and off
IronHead

Kinda true, the output stage amplifier usually has a filter on it to slow down the slew rate..  meaning smooth it out.. can be done with something as simple as a resistor and a cap..  just remember audio output from a PC is far from optimal for re-creating a repeatable signal..  most use a codec instead of a DAC and are AC coupled.  If you want to use a PC, it's best to get a serial DAC that accepts a SPFID digital audio signal, and use a TL084 op amp (General Purpose high speed) to drive the signal to the amplifier

Another choice is finding a Sound Card that uses a DAC vs a CODEC and just short of the cap on the final output stage..  Think Turtle Beach makes some good ones a friend used for Signal Generation


Hope that helps

[hansvonlieven]

Hello, Hans. What do you think about to use an electrostatic speaker to generate the pressure wave?. Thats only an idea... 

G'day allama,

It's not only an idea, it's a bloody good suggestion. This is an absolute must try in my opinion. The poor bass response is not a problem here as I am after the upper harmonics. I will keep you posted on what comes out of this.

Thanks a lot. This is the kind of response I am hoping for.

Greetings from Australia

Hans von Lieven

[allama]

Hello again. I was thinking about this, and this is a possible test enviroment. The squares on the tubes must be rounds. I calculate the tune tube lenght with v = 340 m/s (lambda is aprox. 8 mm at 42,9  KHz).
The refraction on air/water change can be a problem to make coincidence with the two pressure waves. The water depot must have plain walls, not cylindrical.

[hansvonlieven]

Good boy allama,

I am impressed. This is very close to what Keely did with his acoustic resonators. Please give me a day or so to reply to this properly as all of a sudden I can see a way that was a bit foggy to me only a few hours ago.

Thank you very much. It is such a pleasure to see talent and inspiration combined.

Hans von Lieven

[allama]

Hello again. I was thinking... . Lambda isn?t critical, only if the water depot is thin, less than 8mm. In other case, the colision between the two pressure waves will be out of the depot center.
Are you sure about use your modulator?. The modulation must be a little erratic, because the carrier isn?t sinusoidal wave. Multiple harmonics will be present at output...

Great work with your devices... Good luck.