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Setting MXT for best performance

A

Anonymous

Guest
Which gives the best performance between the audio volume using the threshold control or the earphone's volume control? <img src="/metal/html/confused.gif" border=0 width=15 height=22 alt=":?"> <img src="/metal/html/confused.gif" border=0 width=15 height=22 alt=":?">
In other words, should I set the earphone's for maximum volume and then set the threshold control for a low hum, or should I max out the threshold and then back-off on the earphone's volume control so it doesn't blow my eardrums?
 
You should adjust your head phine volume to a tolerable level then adjust your threshold to a low hum, running a threshold to loud can block out some of those faint beeps.
Ray
 
On my MXT, with phones at full volume, and threshold adjusted for comfort, I could lose my hearing when I I cross a soda can! I don't know if the machine works any better, but I always adjust the phones for comfort on a known target, or the side of my car etc.... then adjust the threshold.
If that's not the most efficient, at least I can still hear (out of one ear anyway......... ).
I've dug some might small and deep items with the above also. (like the head of an aluminum nail from six inches in soil beside a barn.... <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">
 
Thanks Ray, thanks BillKY. <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)"> <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">
 
Don't overdo the headphone volume. If your hearing is good and you want to keep it that way set your headphones so that the audio strength on large surface targets is comfortable and non irritating.
Remember that, just as the eye catches movement, the human ear is "tuned" to faint sounds. With good noise blocking phones you do not need high volume levels to hear the fainter signals breaking thru a low threshold.
As a rule I set headphone volume at a <EM><span style="background-color:#ffff00;">low</span></EM> comfortable level when passing the coil about 4-5" over a coin laying on the ground.
Tom
 
Thanks guys. It makes sense now. My mistake was in thinking of the threshold knob as just a "volume" control. <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)"> <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">
 
Rudy,
The threshold is a trigger point for the audio. Set it silent and you will miss the faint whisper from deep targets, set it too loud and the whispers will be covered up by the tone. Set it at a low barely audible level and deep targets will come thru as a whisper or as a slight rise in the threshold hum.
Tom
 
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