Volume VS Threshold

[Beale]

Ok so I got the 705 and have been reading and looking at films. One thing in the manual caught my attention. It seemed to indicate that if the Detector's Volume was to high, you may not hear the object over it or threshold? Now when I ran my 70 I ran both headphone volume and MD volume pretty high. I am about 50% deaf in my left ear.

Here is my question. Should the MD be kept at a lower volume and the headphones turned up to compensate? Thanks, Beale.

 

[Danno]

No, other way round.

Set the volume on the 705 to max (30) and then set the volume on the headset (assuming you have a headset with volume controls on the earpiece).

What you want to achieve is a slight buzzing (like a mosquito) beside your ear.

Danno

 

[Beale]

Yes I do have a set with indivudal volume controls. The graph in the manual is somewhat confusing for me? Thanks, Beale.

 

[mapper65]

Keep in mind that the volume control for main volume and threshold volume maintain one level when using the internal speaker and another when using headphones. That way you don't have to change either when switching from speaker to headphones. What I do in either case is swipe across a coin and set the main volume to a nice desired level. Then as Danno says, set the threshold volume to a slight buzzing like a mosquito. They say you want the main volume as high as possible but I've found that as long as it's at a reasonable level you'll be fine. I think the reason that they say to put the volume all the way up is so that you don't miss anything. That may be true but the way I look at it is that as long as you can hear anything that registers a target ID, you'll be fine.

Being like Beale with minimal hearing in one ear, I try to keep the volume at a reasonable level so that I can preserve the hearing in my good ear and what's left in the bad ear. I think people need a reminder every now and then to be careful of high volume, especially when using headphones. I don't use headphones very often because I think that minimizes stress on the ears not having the sound so close. Just my two cents worth.

 

[Digger]

The key to remember is that the Threshold is the "starting point" for all target signals. If a threshold is too low (as in silent search), a small or deep target might not generate enough audio response to get your attention. And if it is too high, a target may not create enough audio response to overcome the sound of the Threshold. I set my threshold with my speaker volume control at Max. Once I get my Threshold at a level that is just barely audible, I'll plug in the headphones, set that detector volume to Max, and adjust the individual headphone volume controls so the Threshold is still just barely audible, while making any adjustments for a difference in hearing between the right and left ear.

I always hunt with headphones not only to hear the targets. But to also block out any ambient noise. By blocking out the noise of traffic, wind etc, I am able to run with less volume in the headphones and still feel comfortable that I am not missing the more faint audio signals.

Some advice I would give concerning having too high of Threshold........ a year or so ago my brother and I were both hunting a field with our X-70's. I was fortunate to find an old silver 3 cent piece. If you are familiar with that coin, you know how small it is. Anyway, I took it over and showed it to my brother. He asked what the TID had been and I told him a solid 24. I tossed it on the ground for him to scan over it, and he could not detect it unless the coil was right on top of it. We were both using the same detector model, both were using a small DD coil and both had the same ground balance setting. The only difference was the higher level he had his Threshold set. Mine was barely audible (to me) at 4. He had his set up to 12, for some reason. Once he lowered his Threshold to a level that was just barely audible to him (ended up with a 4 or 5), he could detect the silver 3-cent piece with no problem.

In my opinion, the Threshold, Volume and Sensitivity all work hand in hand. Finding a level for each that allows the target signals to be heard, without creating a situation that creates false signals, masks the good targets or neglects those small/deep targets should be our objective. JHMO HH Randy

 

[Jack Beam]

I've noticed without headphones my threshhold will be higher. I've been using headphones and my threshold is almost 10 notches lower. ( around 3 or 4). I can tell the difference in my finds with the headphones.

 

[Digger]

with headphones, you aren't hearing all the other noises in the air and only hear the sound coming from the detector. As such, the Threshold will be more pronounced, as will target signals. HH Randy

 

[TURNMASTER]

Yes, I hunt headphones for the noise blocking ability. At one ball field I have hit this summer I ran without HP's because of the heat, I am happy that it is cooling down now. I have been out 4 times in the last 2 weeks, and am happy that I have been comfterble in headphones. Well I was not able to get out a whole lot through the middle of the summer, so I am happy to be getting out a bit more anyway.

Threshold is critical.

I was under the impression that there is a lower signal boost that allows you to run lower volume in the machine, because it amplifies a weaker signal?

Randy any thoughts?????? I will have to double check but I am sure I am running full volume and adjusting in the HP. Well I have been adjusting the headphones anyhow. I may not have reset the volume after I got my Detectorpro's back from the Koss UR30's

Jeff

 

[xwyokid]

n/t