using a sonar fish finder for a ground scan

[zipzip]

hi prospecters

im just wondering if thers a mean to use a sonar fish finder for tresures huntings cause i feel that it is somting in it
may be sound waves can penetrate the ground and give a scan or by finding a ginus way of modifiying the echosound transduser by somthing or so ;;;;i don't really know
but just feel that it can give an image or a result

[RelicHunter88]

I might be wrong (I don't want to Google it.), but Sonars sent a signal, which is a vibration, through water, and if something is hit by the signal, the signal is reflected back, through water, and receiver catches the "echo".


Water and soil do not have the same viscosity. Actually i think soil cannot have viscosity because it is not liquid, but i think you get the idea that soil is "solid", and if the signal can be reflected by soft fishes, imagine what will happen in rocky ground, and furthermore, signals designed for use in water, probably won't penetrate that deep in soil.

I think that these fancy ground scanners we see on TV series like CSI use X-rays or magnetic fields.
I had seen somewhere some scanners that where used to find cavities, like sewer pipes, graves, etc, so these might use some kind of waves similar to Sonars, but treasures would be most probably covered in soil anyway, so searching for cavities is not what you want.

You might also want to consider what will happen if you wind something too deep. Can you dig it out? There can be many legal issues too, depending on where you live, so making or building a ground scanner might be useless.

[Davor]

Before you try it, check the manual if you may run the sonar in the air at all. The Tx transducer might suffer or get broken because it is designed for water acoustic impedance. The specific acoustic impedance for air is 420 Pa*s*m⁻¹, and for water is 1.48 MPa*s*m⁻¹ - a huge difference.

[Geo]

I tried it before years.
Don't work at all......

[Waikiki_Sweep]

Before you try it, check the manual if you may run the sonar in the air at all. The Tx transducer might suffer or get broken because it is designed for water acoustic impedance. The specific acoustic impedance for air is 420 Pa*s*m⁻¹, and for water is 1.48 MPa*s*m⁻¹ - a huge difference.

There is a last hope to use sonar to find treasure in submerged ground like Ocean bottom. Why not?

Also some items are able to resonate in acoustic frequencies range. For example if you hit a ring you can hear it RINGING for a second.
Why not to try to listen for resonating sounds after sending ping by sonar?

For a ring you can probably even calculate a size from frequency of acoustic resonance.

[kt315]

[Waikiki_Sweep]

Yes. Ship is clearly visible laying on top of the ground. It is usual job for sonar.
But how about to see something berried deep in sand or mud under ocean bottom?