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a transceiver operating at frequencies from 1 kilohertz to 1 megahertz with a power of 25 to 50 watts for geophysical surveying. Regardless of which method is used to obtain the full picture,Originally posted by ivconic View Post
Explain that more detailed, what is all about?
I'm talking about a program I have that acts as an "analysis interface" that receives data in the form of an analog audio signal via the audio port, along with location data (GPS), and possibly transmits/receives via WiFi and Bluetooth.
In other words, the program doesn't actually know what's underground except through the frequency and intensity of the tone you transmit from the device. It then converts this into a three-dimensional visual representation.
What does this mean in practice?
• Frequency = Basic Information
The program treats frequency as a fingerprint of the ground reflection.
When the pulse or tone changes in duration, the program interprets it as a difference in depth or soil/mineral type.
You're not sending direct digital data (unless you want to via Bluetooth or WiFi), but rather a sound similar to "pulses" or "beeps" at a set frequency.
• Strength (Intensity) = Reflection Strength
If the signal is strong, it means a large reflection, possibly a different object or layer.
If the signal is weak, it means greater absorption, depth, or a different material.
• Audio Port
This port receives the signal from your device (such as an Aux cable or USB Audio Adapter).
The software measures the signal's amplitude, frequency, and time signature.
• WiFi, and Bluetooth
WiFi/Bluetooth can transmit the same audio data, but without a cable.
If the device sends pulses, measures them, and then converts them into a tone, the software receives them along with the location and creates a 3D map.
This is not because the software itself operates at 1 GHz to 1 MHz, but because the device that picks up the signal from the ground uses this frequency internally and then converts the measurement results into audio.
The 25 to 50 watts are used to ensure that the electromagnetic pulse penetrates the ground deep enough to pick up strong reflections that the software can distinguish.
Broadcast coil and receiving in it means: Your device sends the pulse from the same antenna from which it receives the reflection, and then an electronic circuit converts the result into an audio signal that the program can read.
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If you ask AI, you'll get this:
1. Hardware side — the transceiver
Frequency range (1 kHz – 1 MHz): This is the operating range of the actual electromagnetic pulses that penetrate the ground. Different soils, minerals, and underground structures reflect or absorb these frequencies differently.
Power (25–50 W): This ensures sufficient energy to penetrate deeper layers of the ground. The stronger the pulse, the more likely a detectable reflection will return, even from deeper or denser materials.
Broadcast and receive antenna: A single coil or antenna often sends the pulse and then receives the reflected signal. The hardware converts this reflection into a measurable signal.
Key point: The transceiver doesn’t “see” the underground in digital terms. It just sends pulses and measures the returning electromagnetic energy.
2. Conversion to audio
The transceiver converts the measured signal into an audio-frequency signal (for example, a series of pulses, beeps, or tones).
Why audio? Audio signals are easy for computers and smartphones to process without specialized ADC hardware. The software can measure:
Amplitude → corresponds to the reflection strength.
Frequency → corresponds to characteristics of the reflected pulse.
Pulse duration/timing → corresponds to depth or layer thickness.
This is why the software “hears” the ground rather than directly measuring the EM fields.
3. Software side — the analysis interface
The program doesn’t know the actual minerals or layers directly. It interprets the audio signal:
Stronger tones → stronger reflections → possibly denser or closer layers.
Frequency or pulse changes → interpreted as different materials or depths.
3D visualization:
Combines multiple points collected along a path (with GPS) to generate a 3D map of the underground variations.
Can apply filtering, smoothing, or color coding to visualize strength and depth.
4. Optional wireless transmission
WiFi/Bluetooth: Instead of using a cable to the computer, the device can send the same audio-converted data wirelessly. The software still interprets it the same way.
The software remains the same: it treats the incoming data as amplitude/frequency/time information and maps it in 3D space.
5. Practical takeaway
Think of the system as “seeing through sound”:
Hardware sends EM pulses into the ground.
Reflections are picked up and converted into audio signals.
Software listens to these audio signals and interprets them as depth, material type, or anomalies.
GPS positions allow plotting these interpretations in 3D space.
The frequencies and wattage are only relevant to the hardware to ensure meaningful reflections; the software just reads the resulting audio and does the mapping.
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Originally posted by ivconic View PostIf you ask AI, you'll get this:
1. Hardware side — the transceiver
Frequency range (1 kHz – 1 MHz): This is the operating range of the actual electromagnetic pulses that penetrate the ground. Different soils, minerals, and underground structures reflect or absorb these frequencies differently.
Power (25–50 W): This ensures sufficient energy to penetrate deeper layers of the ground. The stronger the pulse, the more likely a detectable reflection will return, even from deeper or denser materials.
Broadcast and receive antenna: A single coil or antenna often sends the pulse and then receives the reflected signal. The hardware converts this reflection into a measurable signal.
Key point: The transceiver doesn’t “see” the underground in digital terms. It just sends pulses and measures the returning electromagnetic energy.
2. Conversion to audio
The transceiver converts the measured signal into an audio-frequency signal (for example, a series of pulses, beeps, or tones).
Why audio? Audio signals are easy for computers and smartphones to process without specialized ADC hardware. The software can measure:
Amplitude → corresponds to the reflection strength.
Frequency → corresponds to characteristics of the reflected pulse.
Pulse duration/timing → corresponds to depth or layer thickness.
This is why the software “hears” the ground rather than directly measuring the EM fields.
3. Software side — the analysis interface
The program doesn’t know the actual minerals or layers directly. It interprets the audio signal:
Stronger tones → stronger reflections → possibly denser or closer layers.
Frequency or pulse changes → interpreted as different materials or depths.
3D visualization:
Combines multiple points collected along a path (with GPS) to generate a 3D map of the underground variations.
Can apply filtering, smoothing, or color coding to visualize strength and depth.
4. Optional wireless transmission
WiFi/Bluetooth: Instead of using a cable to the computer, the device can send the same audio-converted data wirelessly. The software still interprets it the same way.
The software remains the same: it treats the incoming data as amplitude/frequency/time information and maps it in 3D space.
5. Practical takeaway
Think of the system as “seeing through sound”:
Hardware sends EM pulses into the ground.
Reflections are picked up and converted into audio signals.
Software listens to these audio signals and interprets them as depth, material type, or anomalies.
GPS positions allow plotting these interpretations in 3D space.
The frequencies and wattage are only relevant to the hardware to ensure meaningful reflections; the software just reads the resulting audio and does the mapping.
Already I asked. Anyway thank you
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ivconic: There is a technology that can help you a lot. Originally developed in Russia, and as far as I know still sold there, it is a microcurrent tens. Basically a damped sinusoid. A pulse between 1 us and 512 usec is applied to a flyback transformer. The removal of this induces a damped sinusoid just like the PI coils. HOWEVER. By controlling the voltage you can get a +500 -500 volt range, with nano amps of current. Take the output of the secondary, and apply it to the body with gel pads. That is the basis of the scenar, and Avazzia devices (which I designed and wrote the code for, and whom I still work for). There is a lot to say about how it works, but the body does not accomodate to it, as the impedance load of the body modifies the damped sinusoid. 60 hz, 90 hz and 121 hz seem to be the most common frequencies, though our device can go from .5 hz up to 2500 hz. This technology is well within your skill set.Originally posted by pito View Postfor back nerve pain I used the ginger chopped in small pieces one teaspoon every day and pain is gone away.
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I was asking because years ago Iwas working on scanning magnetometer, it w3as able to detect such magnet from distance 15m.Originally posted by ivconic View PostAudio "threshold" is set to 500nT (scale is 2000nT) in both videos.
Because I'm in a room full of industrial noise and various small local magnetic fields.
Regarding noise, you need 20Hz LP filter use for that max7400.
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This is not metal detector, this is magnetometer/gradiometer.Originally posted by pito View Post
I was asking because years ago Iwas working on scanning magnetometer, it w3as able to detect such magnet from distance 15m.
Regarding noise, you need 20Hz LP filter use for that max7400.
It's main purpose is to measure strength and polarity of Earth's magnetic field, 20-30cm (sometimes 50cm to 1m) above the soil surface.
Othrwise , in ideal conditions (far out of the city noise and industrial hum) I can count automobiles passing the road 100m away, no problem.
Reason I made videos like that is not to show "depths" but to examine the agility and behavior on dipoles and sudden polarity changes.
I usually make such videos first for myself, as a reminder. Later on I decide to post some of those in public.
Most of my videos are unlisted and private. Sometimes I make them public to send to distant friends and show them for short period.
Behavior on such magnet... I am not particulary interested to test. However; if I come across such one: I will do it and let you know.Last edited by ivconic; 08-24-2025, 10:09 AM.
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This is something funny I give here as a toy to play with.
Works on Windows 10. Will not work on Windows 7.
Password is: Geotech
https://drive.google.com/file/d/1hBj...ew?usp=sharing
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Everyone protects their own manufacturer interestOriginally posted by ivconic View PostFrom 2018, when I developed my first "Euromag3D" to today, numerous customers and users constantly complain to me why my devices and software do not have a "depth measurement" function.
And at the same time, they demand that I add it in the next revisions.
It is difficult to explain the true facts to "dreamers".
Magnetometers, particularly gradiometers, can detect variations in the Earth's magnetic field caused by buried objects or geological structures.
However, directly measuring depth is not always straightforward.
Instead, depth estimation relies on analyzing the magnetic anomaly's shape, width, and amplitude.
Methods for Depth Estimation with a Magnetometer (Gradiometer)
- Half-Width Rule (Simplest Approach)
- Euler Deconvolution (Mathematical Approach)
Uses the magnetic field's gradient to estimate the source's depth and location.
Requires choosing a "structural index" (related to the object's geometry, e.g., sphere, cylinder, fault).
Common in geophysical software (e.g., Oasis Montaj, Geosoft).
- Inverse Modeling (Advanced Approach)
Software (e.g., Mag2DC, GM-SYS) creates a 2D/3D model of the subsurface that matches measured data.
Adjusts depth, size, and magnetic properties iteratively for best fit.
- Multiple-Sensor or Multi-Height Surveys
Measuring the same area at different heights helps distinguish shallow vs. deep sources.
Shallow objects produce sharp, high-amplitude anomalies.
Deep sources generate broader, weaker signals.
Limitations & Challenges:
Magnetic properties matter: Ferrous metals (high susceptibility) are easier to detect than weakly magnetic materials.
Noise interference: Nearby structures, power lines, or geological noise can distort signals.
Gradiometers improve shallow detection but may struggle with very deep targets (>10–20 m, depending on object size).
While a magnetometer alone cannot directly "measure" depth, depth estimation is possible using analytical techniques (half-width rule, Euler deconvolution) or modeling.
For higher accuracy, combine magnetometry with other geophysical methods (e.g., ground-penetrating radar or electrical resistivity tomography).
...
Several key reasons explain why certain manufacturers (like OKM or some Turkish brands) claim their magnetometers or "multi-sensor detectors" can precisely measure depth,
even though this is technically impossible or highly unreliable:
-Marketing deception and exaggerated claims
False advertising: some manufacturers intentionally exaggerate device capabilities to attract buyers (especially those without technical knowledge).
-Unverifiable demonstrations: Promotional videos often use prearranged setups or data manipulation.
-Buzzword exploitation: Terms like "3D scanning," "exact depth up to 20m," or "AI analysis" create an illusion of advanced technology.
-Technical Limitations of Magnetometers & Gradiometers
Magnetometers don’t measure depth directly—they only detect magnetic field variations.
Depth can only be estimated (e.g., via anomaly width), never with absolute accuracy.
Factors causing errors:
-Object size and shape
-Magnetic properties of materials
-Interference from other metals or geological structures
-Earth’s magnetic field fluctuations
-Sensor Fusion and Fake "3D Technology"
- Some expensive devices (e.g., OKM EXP 6000 or Turkish Jeohunter) combine:
a) Magnetometers,
b) Metal detectors,
c) Pseudoscientific methods (e.g., "radio frequencies" or "resonance").
They lack true 3D tomographic imaging (like GPR or seismic sensors).
Software generates simulated images from vague data, creating a false sense of precision.
The "targets" are often beginners or treasure hunters ( I like to call them "dreamers").
Unrealistic expectations: buyers believe they’ll find "buried treasure chests at 10m depth."
Lack of technical knowledge: many users don’t understand geophysics and fall for marketing claims.
Fake reviews: some manufacturers pay for fake testimonials or delete negative comments.
How to spot a scam:
- Measure depth below 1m accurately (possible, but with significant error).
- Detect non-metallic objects (wood, ceramics) with a magnetometer = impossible.
(When we mention ceramics; except in special cases of ancient ceramics with a huge percentage of ferro-oxide. A very narrow band of possibilities and slim chances).
- Scan depths beyond 5m precisely = highly suspicious.
...
Conclusion: why do these claims persist?
Profit motive: cheap devices are sold at high prices due to false promises.
Lack of regulation: no standardized testing for these devices.
Human psychology: people prefer "magic tech" over scientific facts.
For real depth measurement, use:
1) GPR (Ground-Penetrating Radar) for shallow objects.
2) Electrical resistivity tomography for greater depths.
3) Seismic refraction for geological surveys.
Magnetometers are useful but cannot give exact depth—only estimates!
Always verify claims with independent research before buying.
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Lately, it has been popular among the people some kind of "Conrad xyz"... "scanner"... and it is often mentioned.
The established practice of most of the Turkish and others small producers is to give "German" names to their handicrafts.
"Conrad" is a long-known name and breed of an Austrian-German trading house, which has a whole chain of shopping centers throughout Austria and Germany (probably also throughout the EU, I'm not sure, I haven't checked).
"Conrad" has a habit of reselling various products that do not have a recognizable brand, often making strange deals by sticking their "Conrad" stickers on some third-rate products.
The last time I visited a "Conrad" department store in Austria was back in 1992, when I bought a White's Eagle IIc metal detector there.
However, that real Austrian "Conrad" DOESN'T HAVE THE SLIGHTEST CONNECTION with the "stick" magnetometer that says "Conrad" ("scanner").
Turkey is still not a member of the EU. I suspect that this is the main reason why those and similar attempts are still not sanctioned.
Because in the last few years, the most of such attempts come from Turkey.
Even China has passed very restrictive laws that have been in place for the past few years.
These days, you can't sell a clone or similar copy of a Western product from China.
The Chinese authorities conduct constant monitoring of the market and severely punish such attempts.
The famous Chinese copies of Garrett, Fisher and Minelab detectors can no longer be found so easily even on Aliexpress.
In a conversation with a colleague from China, I learned that China has agreed to strict control and absolute protection of the copyrights of producers from the West.
This is good news for China as well as for the rest of the world.
But there are still a few parts of the planet where "everything is allowed".
Turkey, Kuwait and some other Arab countries. This is where the biggest similar production of such devices come from today, on the topic we are dealing with here on the forum.
"Made in Germany", "Made in USA"... whenever you see these claims prominently displayed on an advertisement; have a 99% doubt about the credibility in advance.
Why is "Made in Germany" such a beloved sentence in Turkey?
Because there are more than 5 million Turks in Germany.
And because it is easiest to start a "company" in Germany.
You don't even need to go to Germany.
You can complete everything online through German agencies.
You need to fill out forms and deposit a certain amount in advance to an account of those agencies.
To be honest, I myself was thinking of starting a "company" of the "Made in Germany" type.
But I gave up.
Too late for me to make such "business".
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