Silent Search vs. Threshold

[sprailroad]

For many years, I've always had the background hum, When I first bought the AT Pro, it was silent search, at first, I thought I had a defective machine, for I cannot recall anything in the Ad's stating "Silent Search", found out later it was indeed a Silent Search type of machine. OK, I got to like it, but I also use a Mine Lab Safari, with of course back ground hum, of which I also like. It seems that the AT Max has a background hum, I do not know about the AT Gold. So, why the change? Background hum better for response? than Silent Search. I really would like to hear any thoughts on this. I'm not to crazy about the Pro Audio (Deeper the target, softer the sound) but you work with it. I know I could go into standard mode, but the constant "Bell Tone" makes me nuts. The AT Max MAY be a repeat of the Pro, to early to tell yet. Any advantage to Silent Search or not that you can think of.

 

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[PowerDubs]

I also own a ctx- having a constant tone can alert you to a deep item. The noise will stop for a second - the machine knows there is something there without having enough info to make an indication of what it may be.


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[John-Edmonton]

When you use the threshold properly, you are listening for any slight change in audio, indicating a possible DEEP target.

 

[gunsil]

I also own a ctx- having a constant tone can alert you to a deep item. The noise will stop for a second - the machine knows there is something there without having enough info to make an indication of what it may be.


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When a minelab or most machines stop the hum for a second it is called "nulling out" and usually indicates iron.

 

[Terry Soloman]

It's really just a matter of preference. With a VLF, or PI machine, the threshold going quiet, or diminishing, usually does mean a deep target. Most of the time you would not hear it in Silent Search mode however.

 

[PowerDubs]

When a minelab or most machines stop the hum for a second it is called "nulling out" and usually indicates iron.

Reread what I wrote. A deep signal that the machine doesn't have enough info to decide what type of metal, won't give a target number - but can and will still disrupt the hum- and not be iron.

If you think all 'nulling' is iron, you are leaving finds behind.


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[sprailroad]

I fully understand what you fella's are saying. I guess my thought was that the AT Pro is silent, where the new AT Max has threshold hum. Is it because the background hum is a Better? way to go? Is that why the change? It could just be a matter of what any one person likes. Might it be that it takes a stronger signal response to break through the "Silent" search, whereas the "Hum" might respond better for faint targets. I don't even know if there are other machines that have a Silent search to them. It's not a big concern really, every detector is different. Just wondered why that what is basically the same machine would be different in this matter. Has Garrett found that one is better over the other? I hunt most often by sound, I do look at the VDI numbers, but as a reference only. As far as the minelab's, that "Flute" like sound it has I at first did not like, then one day it clicked, and I do well with it. I do understand the nulling with the minelab all to well. So, I like the AT, silent is OK, Just wonder WHY the change. Wonder what Garrett would have to say.