If I adjust the threshold to the point where the threshold just cannot be heard when using my stock headphone then switch to my other headphones I can then hear the threshold. This is one idea of the threshold and is not referenced to adjusting to a point such as 0, 1, 2, 3 as indicated by the detector. The other is using the indications to set it at 0, 1. 2, 3,
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Threshold Adjustment
- Thread starter Cody
- Start date
It decreases incrementally but we have to consider the hearing of the individual. As an example you may hear it at 5 but I cannot hear it below 8. We have to consider the dynamics of the sound from the detector, headphones, and our personal hearing.
I was very surprised to hear how much difference various headphones make compared to the stock headphones. I don't hear well at all with the stock ones compared to others. The stock phones don't reproduce the high faint sounds for me nearly as good as the ones I use. If I change headphone then I have to set the threshold to a different point so it is just at the threshold of sound.
I was very surprised to hear how much difference various headphones make compared to the stock headphones. I don't hear well at all with the stock ones compared to others. The stock phones don't reproduce the high faint sounds for me nearly as good as the ones I use. If I change headphone then I have to set the threshold to a different point so it is just at the threshold of sound.
Cody or anyone else,
I've been noticing that during power up.. there are some
sounds that are heard.. one of these is a very faint, very
high pitched sound... I've wondered if this is some sort
of built in "test" during power up.. anybody know..
it also seems that I hear a short display of sounds.. that
seem to be trying to let you know what filters you may be
using?!
I'm I the only one that has heard these?!
I know, I know.. one more step closer to the luney bin..
Just wondering.. anyone else hear this sounds during powerup...
or do I have some whacko explorer (or is it the user.. again?!)..
Just wondering.. as usual...
Dan
I've been noticing that during power up.. there are some
sounds that are heard.. one of these is a very faint, very
high pitched sound... I've wondered if this is some sort
of built in "test" during power up.. anybody know..
it also seems that I hear a short display of sounds.. that
seem to be trying to let you know what filters you may be
using?!
I'm I the only one that has heard these?!
I know, I know.. one more step closer to the luney bin..
Just wondering.. anyone else hear this sounds during powerup...
or do I have some whacko explorer (or is it the user.. again?!)..
Just wondering.. as usual...
Dan
The equipment I have worked on over the years had a power up and down sequence. The idea was to get everything ready to go in sync. That may or may not be what you are hearing as I am not aware of any sounds that inform the user of useful data such as filter data or power up information.
Can I consider the threshold akin to a "squelch"? Faintest threshold allows weaker targets to "break" through? What happens if there is no threshold? I guess I'm still a little confused as to what the threshold actually does...
Normally, I run it so it's very faint although I noticed that my two user settings (one for the beach and one for dirt) were actually different; one a little louder than the other. Now that I have the Black Widows, I'll have to take another look at the settings.
Thanks!
Normally, I run it so it's very faint although I noticed that my two user settings (one for the beach and one for dirt) were actually different; one a little louder than the other. Now that I have the Black Widows, I'll have to take another look at the settings.
Thanks!
Yes, I think that is a good way to think of the threshold. If the squelch is set to high then we will not hear the weaker signals. In our situation it is if the threshold is set at 0. The ideal point for most purposes is just at the point where the user hears the slightest hum. Weaker signals are not consumed in breaking the squelch is a way to put it.
Our audio has Gain, Sensitivity and Threshold that all work together. Gain is modulated and sets the overall ratio of how much a signal is amplified. Sensitivity sets how faint of a signal we want to amplify and Threshold sets the Squelch as in the above example. If you know about amplifier it is like designing the class of an amplifier so it is ON, Just OFF, Hard OFF, Hard ON, etc.
Our audio has Gain, Sensitivity and Threshold that all work together. Gain is modulated and sets the overall ratio of how much a signal is amplified. Sensitivity sets how faint of a signal we want to amplify and Threshold sets the Squelch as in the above example. If you know about amplifier it is like designing the class of an amplifier so it is ON, Just OFF, Hard OFF, Hard ON, etc.
Cody, I find this thread interesting from the perspective of someone with hearing issues.
I have my threshold up a bit because of my hearing loss. I want to hear the break in the threshold to know there is a target below.
If I understand what you are saying, setting the threshold up may cause me to MISS a faint or weak signal from a deep, small object because it won't be strong enough to cause a break in the threshold?
Is this true regardless of gain setting?
Concerned,
Mike
I have my threshold up a bit because of my hearing loss. I want to hear the break in the threshold to know there is a target below.
If I understand what you are saying, setting the threshold up may cause me to MISS a faint or weak signal from a deep, small object because it won't be strong enough to cause a break in the threshold?
Is this true regardless of gain setting?
Concerned,
Mike
I also have hearing problems so have to use headphones and adjust the Gain, Volume, and threshold so I hear a deep target the best. The best setting is to match the threshold of sound of the detector to the individual's threshold of sound. Mine may be at 14 and yours at 13 but we are going to do just fine. We can set the threshold much higher than this and that could cause us to not hear deeper targets. The faint sounds are "lost" in the threshold sound.
Where we get into trouble is setting the threshold below 0 or far below our threshold of sound. If my threshold is matched at 14 and I crank it down to 8 I am going to miss some deeper hits because I will never hear the faint sound.
However, for the most part what I was saying is 0 on the Explorer is not the same as silent threshold on some other machines. I know as an example that Fisher uses what we call chirp discriminators so set the threshold below sound to stop the chirping sounds. They have a complex circuit to keep the threshold just slightly below sound. I have tested these against my Explorer at 0 threshold and will mot detect a faint target with my Explorer that I will with a Fisher designed for silent threshold operation.
What some folks will do in real noise trash sites is set the threshold to 0 even if the sensitivity is reduced to stop all the chatter from trash. I think they understand the detector will not be as sensitive to deep targets when they do this.
Where we get into trouble is setting the threshold below 0 or far below our threshold of sound. If my threshold is matched at 14 and I crank it down to 8 I am going to miss some deeper hits because I will never hear the faint sound.
However, for the most part what I was saying is 0 on the Explorer is not the same as silent threshold on some other machines. I know as an example that Fisher uses what we call chirp discriminators so set the threshold below sound to stop the chirping sounds. They have a complex circuit to keep the threshold just slightly below sound. I have tested these against my Explorer at 0 threshold and will mot detect a faint target with my Explorer that I will with a Fisher designed for silent threshold operation.
What some folks will do in real noise trash sites is set the threshold to 0 even if the sensitivity is reduced to stop all the chatter from trash. I think they understand the detector will not be as sensitive to deep targets when they do this.
Let's see if I understand. You are pointing out that you could miss a faint audio response in the threshold "noise" just by having the threshold up too high. Essentially, the louder threshold hum would overwhelm your ear's ability to pick out the faint audio response.
You could also miss a faint audio response because the the threshold is so low that my ears just can't hear the faint audio. This implies to me that I should actually make sure I have the volume and gain up high enough to hear the weakest of faint audio signals. Set the threshold low, but high enough to just hear the hum. Now I should be able to hear responses at or near the same audio level...?
Does this mean that you could miss any faint signals that are audibly lower than the current threshold sound level?
Example: Let's say I am using 'DEEP' on, have the gain set to at least 7 and the volume at 10. And let's forget for a moment whether my ears are capable of 'normal' hearing or not.
With those settings, is the EX2 going to generate an audible signal that the 'normal' ear could hear for the weakest of targets? I'm trying to establish at what audio settings the machine will generate an audio response that the 'normal' human ear can hear, no matter how small or deep or faint the target is.
You could also miss a faint audio response because the the threshold is so low that my ears just can't hear the faint audio. This implies to me that I should actually make sure I have the volume and gain up high enough to hear the weakest of faint audio signals. Set the threshold low, but high enough to just hear the hum. Now I should be able to hear responses at or near the same audio level...?
Does this mean that you could miss any faint signals that are audibly lower than the current threshold sound level?
Example: Let's say I am using 'DEEP' on, have the gain set to at least 7 and the volume at 10. And let's forget for a moment whether my ears are capable of 'normal' hearing or not.
With those settings, is the EX2 going to generate an audible signal that the 'normal' ear could hear for the weakest of targets? I'm trying to establish at what audio settings the machine will generate an audio response that the 'normal' human ear can hear, no matter how small or deep or faint the target is.
Cody , I have nerve damage hearing loss ( with tinnitus) in my left ear .So my Right ear is doing 99% of the work . I have the Threshold adjusted to a slight hum . Volume opened all the way . Grain set at 6 or 7 . If I set the Gain higher would that make me lose the deeper targets ? Do they make a Headphone to help with this type of hearing loss ?
Thanks
Dennis 2
Thanks
Dennis 2
Not at all unless you have so much intensity of sound your hearing gets insensitive due to the loud sounds.
Sensitivity settings are for depth while audio gain is modulation and overall amplification of all signals. I have tinnitus iso have the same problem. Modulation if the gain is below 6 can cause guys like us to miss the deeper targets since faint deeper targets sound faint. Once we get to above about 8 on audio gain all targets at all depths sound intense.
We can also use Deep ON to place emphasis on deep targets. We need to NOT scrub the coil if Deep is ON as this will cause shallow surface targets to give pecking sounds and since we have the gain set very high this can be very distracting. Just keep the coil as close to the ground as we can if Deep is on but don't scrub the ground.
Hope this helps,
Sensitivity settings are for depth while audio gain is modulation and overall amplification of all signals. I have tinnitus iso have the same problem. Modulation if the gain is below 6 can cause guys like us to miss the deeper targets since faint deeper targets sound faint. Once we get to above about 8 on audio gain all targets at all depths sound intense.
We can also use Deep ON to place emphasis on deep targets. We need to NOT scrub the coil if Deep is ON as this will cause shallow surface targets to give pecking sounds and since we have the gain set very high this can be very distracting. Just keep the coil as close to the ground as we can if Deep is on but don't scrub the ground.
Hope this helps,
I understand the Sun Ray Pros a good and have a volume control for each ear which is a real plus for this problem. I use the Gray Ghost Originals but would like to have a volume control on each ear and they do not. That is my only compliment with the ones I use. If we have tinnitus then we can use the duel controls in my opinion.
Cody,
I've been following these posts... and... these thoughts are running
through my head.
Suppose I've come to the pattern of hunting with sens. at 20-21,
no discrimination, gain at 5-6, deep off. I've set the threshold at the first notch where I hear theshold.. one more notch down and I hear no threshold.
Now.. I decide... I'm going to try a high discrimation pattern..
so I set it up so that I'm basically discriminating out all but
what I would hope to be "silver" coins.. or let's say.. something like you quarters pattern I saw a while back.. but.. also... I decide
I want to be less distracted.. (cut out the nulls).. so I bump the threshold down one notch to wear I first do not hear threshold (not 0 threshold)... but also with these settings I increase gain to 8, and
sens. to 28-29.
Which of these settings will give me the least responses to targets..
with the realization that the "silent" mode is also masking nulls.. and that I have to take this into consideration and probably make sure I slow my sweep/hunt speed down?!
I guess what I am asking is.. can you explain what I have lost by going into high-discrimination and a "silent" hunt mode with the changes as mentioned above?!
Thanks in advance,
Dan
I've been following these posts... and... these thoughts are running
through my head.
Suppose I've come to the pattern of hunting with sens. at 20-21,
no discrimination, gain at 5-6, deep off. I've set the threshold at the first notch where I hear theshold.. one more notch down and I hear no threshold.
Now.. I decide... I'm going to try a high discrimation pattern..
so I set it up so that I'm basically discriminating out all but
what I would hope to be "silver" coins.. or let's say.. something like you quarters pattern I saw a while back.. but.. also... I decide
I want to be less distracted.. (cut out the nulls).. so I bump the threshold down one notch to wear I first do not hear threshold (not 0 threshold)... but also with these settings I increase gain to 8, and
sens. to 28-29.
Which of these settings will give me the least responses to targets..
with the realization that the "silent" mode is also masking nulls.. and that I have to take this into consideration and probably make sure I slow my sweep/hunt speed down?!
I guess what I am asking is.. can you explain what I have lost by going into high-discrimination and a "silent" hunt mode with the changes as mentioned above?!
Thanks in advance,
Dan
If your threshold of sound is with the threshold at 8 and it is set to 0 then you must drive the sound from 0 through 7 before you hear a hit. After we have made adjustments as you suggest or others of this kind we then adjust the threshold to the slightest hum. If we get a lot of trash hits and don't want to kill them with rejection we can decrease the threshold a click below our threshold of sound. I have done this and at one time this was a common way to decrease sensitivity on the older detectors. I don't know how to quantify how much sensitivity we have lost other than to test this for ourselves on targets.
It is my understating from the posts and what Minelab tells us that we only drop a little depth in doing so. I have tested at various levels for myself and one I get below the threshold for my hearing then deep targets start to not be heard. At 0 the fainter targets such as a dime on edge or at 8 to 10 inches in general are not detected.
May I suggest sticking a dime in a piece of clay at different angles then test the depth with the threshold at different settings. I seem to dodge this question but the threshold setting is very specific to the hearing of the individual, headphones, sweep consistency, etc. We are just told that once we have our setting as we like then adjust the threshold to the slightest hum for the greatest depth.
I have read post by user that use 0 as a threshold setting all the time and claim to do just find. My test have show I would not get near the depth I need for coins at the sites I hunt. I have gone to silent discrimination in some old yards where the null or hits was almost beyond belief. That to me was better than not hunting the yards and I did good but knew I would miss the really deeper finds. However, I will use a smaller coil to work in heavy trash knowing it will not get the same depth as a larger one in clean ground. I trade off between working between trash targets and the depth I drop due to co-location so it is a trade off.
What I started out to say is just that 0 discrimination is not the same as silent threshold for some of the guys that use a Fisher or are switching from them to the Explorer.
It is my understating from the posts and what Minelab tells us that we only drop a little depth in doing so. I have tested at various levels for myself and one I get below the threshold for my hearing then deep targets start to not be heard. At 0 the fainter targets such as a dime on edge or at 8 to 10 inches in general are not detected.
May I suggest sticking a dime in a piece of clay at different angles then test the depth with the threshold at different settings. I seem to dodge this question but the threshold setting is very specific to the hearing of the individual, headphones, sweep consistency, etc. We are just told that once we have our setting as we like then adjust the threshold to the slightest hum for the greatest depth.
I have read post by user that use 0 as a threshold setting all the time and claim to do just find. My test have show I would not get near the depth I need for coins at the sites I hunt. I have gone to silent discrimination in some old yards where the null or hits was almost beyond belief. That to me was better than not hunting the yards and I did good but knew I would miss the really deeper finds. However, I will use a smaller coil to work in heavy trash knowing it will not get the same depth as a larger one in clean ground. I trade off between working between trash targets and the depth I drop due to co-location so it is a trade off.
What I started out to say is just that 0 discrimination is not the same as silent threshold for some of the guys that use a Fisher or are switching from them to the Explorer.