The speakers are anything between 4 and 16 ohms. The human body is in the kohm range. Output transducer is simply two pieces of copper pipe that I will be holding on my hands. Wrapped in wet napkins, made wet with salt water. That is standard in a primitive rife-inspired machine that I already have, which does not target individual microbes but produces noise and kills the "easy ones" that are exposed at places of high conductivity. Around 10 V is required, should be within the capabilities of a 100 W stereo.

Sorry - but no.

The "device" doesn't work. It has been a scam ever since the 1880s. If you have enough power to kill a bacteria you also have enough to kill yourself. And the frequency is irrelevant. It is the molecules within the cell that get damaged - and that includes all cells.

http://www.darwinawards.com/darwin/darwin1999-50.html

You are setting yourself up for suicide. You can electrocute yourself with VERY low voltages, all it takes is a little mistake.

I have stopped a cold in its tracks many times with the crude device that I already have, at 9 V. But chronic microbes are different, they are not in easily accessible places therefore require sharp resonance.

Thanks for the input. But please try to answer the question in the title if you know where to look. This is a technical forum.

Self delusion is easy.

A cold is a virus - not bacterial. It only lives inside your cells. Kill the cell - kill yourself.

And you have already been given answers.

Just try not to talk about things outside your expert knowledge. Colds are caused by both bacteria, viruses and fungi fyi. When resonance breaks a glass, it does not break its window frame. This is elementary high school physics.

Nope. The only cold is caused by the rinovirus family. Some SYMPTOMS of a cold can be caused by bacteria/fungi - but that is not a cold. Those are infections that have to be treated differently. You also left out allergies that also cause symptoms of a cold - again, must be treated differently.

Resonance only works when the item to be resonated with is isolated from other absorbing media. The window breaks only in the center. The window frame absorbs the vibration. And without the window frame the pane has a different resonance frequency (it actually won't break - but will vibrate in sync with the sound wave as a single unit, this also one of the reasons the calking around windows is supposed to be soft - it allows the pane to move with the sound wave, and absorbs the leftover mechanical motion).

Sound waves will not kill a cell until you get a high enough power to shatter the cell wall - then it will also shatter any other cells in the same area of similar shape. And cells do not have a single resonance (except perhaps blood cells - but then when they are squeezed through capillaries they get elongated - with two resonances.

Electric waves do not kill cells directly - they do it by pulling molecules apart, high enough frequencies do it by causing heating...

Sorry - I have done that in a lab.

You should go and educate some doctors.

This is the problem with giving off-topic details in LQ. I shouldn't have said what the frequency generation is for. Too much distraction.

Now where is the button that says Stop the off-topic words of wisdom?

The real medical doctors already know this.

The quacks deliberately don't. They just like the money from the scam.

Like grannies cold cure. Guaranteed to work in 8 to 10 days...

You are being warned because what you are trying to do is potentially fatal.

Modern computers have fixed a lot of things, but they've introduced just as many things. With CPU scaling and thermal throttling timing is not that predictable anymore. But computers are faster so one can fudge around in the realm of accuracy. Many soundcards sample at 192kHz now. With samples being the peaks and valleys of the waveform, so 192kHz can capture up to a 96000Hz frequency. Which would be up to 9600Hz with a 0.1Hz decimal precision. But the clock in the audio devices are not consistent, even on cards of the same make and model. Record the same thing on two devices and you'll have have a difference in the range of a second or more over the course of an hour.

Everyone within this thread has been helpful to you. Bringing concerns for isolation techniques to save someone from doing harm is on topic. You opened this thread and other members are contributing to it. You may not feel that the topic of safety is not a concern for you then you should expect harm by not following good safety techniques. Without proper isolation techniques then harm is very possible to you.

Skin resistance can vary between individuals and varies at body points of measurement.

So from a mods point of view, this thread has been interesting and opened concerns for your safety by other members with detailed information. So look at this as continued reply for the topic with concerns for safety for your well being.

1 members found this post helpful.

Nyquist is about the ability to completely reconstruct an arbitrary waveform from the samples, it is not about the accuracy of the sampling interval:

If the sampling interval is off by a few nanoseconds, 2345.6 Hz will be in fact 2345.7 Hz. This is the real issue here, sampling frequency accuracy.

I have studied electrical engineering at university level. The one advising against touching the copper of speaker leads in a home stereo probably has not. Yet another reason for each of us to stay within our area of experties.

Hi,

If you have studied EE and completed your education then the issue with proper isolation should be apparent. If your skin resistance breaks down and there is enough current and the right situation with potential then you could cause harm to someone or yourself. Even with a sound system there can be hazards with potential component failures that could cause leakage issues.

Ventricular fibrillation can be an issue if your system fails with a current flowing through the system and you are between the potential and ground with low skin resistance (which you have stated that salt water whetted napkins between the signal source and your skin will reduce the skin resistance). Optocoupler isolation would prevent that issue by providing transfer via the optics and using a isolated personal power source. As a EE you should know that it takes less than 100mA to cause harmful issues for some people who have a low skin resistance.

Maybe this will help you too understand; Medical Devices Isolation-"How safe is safe enough" sure it is for medical equipment but the principles are there.

It's your life but I would suggest that you not perform this on someone else that trusts your opinion and you have not considered proper isolation thus causing potential harmful situation.

BTW, I too come from Academia and we did build experiments that required isolation to protect against potential human harm.

Hopefully you get your ego out of the way so no harm can come to anyone by your poor understanding of potential harm by not following proper techniques.

I do consider this as part of my field of expertise since I have studied and performed within the profession of instrumentation.

Maybe these quotes can help;
Safety First!!
Hope this helps.