Headphones frequency response

[ezer19]

Is it really important to md's? there in example ranges between 20 and 20.000 Hz. Will i "lose" sounds if i ignore this?

 

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[DizzyDigger]

Is it really important to md's? there in example ranges
between 20 and 20.000 Hz. Will i "lose" sounds if i ignore this?

These are the freq. the detector will use in converting the received data into sounds, and
then sending those sounds to your headphones. A young healthy person can hear that
entire spectrum (20-20,000 Hz.), but as we age we tend to lose the "peaks".

You can't ignore them, but some machines will allow you to assign certain sounds
to various responses (ie: Can slaw, iron, etc.).

 

[Frankn]

I doubt that your detector will produce a tone over 1K HZ. Just my guess. Check your manual. It's a detector, not a musical instrument! Frank...

 

[ezer19]

I doubt that your detector will produce a tone over 1K HZ. Just my guess. Check your manual. It's a detector, not a musical instrument! Frank...

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I was often in the situation that my headphones produced only a very faint and high pitched signal. in this case, I pulled the plug and took the speakers of the md. then I got a better signal. that's why I asked the question whether the quality of the headphone could have an influence. dizzidiggers answer has helped me in this sense.

 

[Centar]

I find the crappy cheap headphones better as they tend to mellow the harshness of the tones and my MD only had 5 different tones, none of which are very high pitch, maybe 1000Hz for the top one. What Kind of MD do you use? I have a Teknetics Delta 4000.

Metal detectors do NOT produce high fidelity audio and thus do NOT need high fidelity speakers or headphones.

 

[ezer19]

Have a teknetiks omega 8000. this device maybe have the same software like the Delta for soundprocessing. The md should better work with headphones than without. So i think my headphones are defekt.

 

[Frankn]

Your headphones are basically resistors in the form of wire wound coils that cause a diaphragm to vibrate, thus causing sound. They are made in resistor values of 4, 8, 16, and 32 ohms + some custom units. The most popular is the 8 ohm headphones. You are suppose to match the output circuit, but any will work . The higher the resistance value in ohms, the lower the volume of the headphones. I use a Kloss set that I got from Whites for my XLT on occasions and my Surfmaster PI has it's supplied phones. Frank...

 

[Centar]

Can't see how a MD would work better with headphones than without except for in a noisy environment...My Delta 4000 is too loud even at its default setting and I find myself always turning it down to volume 3. with the headphones on even this setting is too loud so I use the headphone volume control to turn it down even more, the MD makes the predetermined tones through an electronic oscillator circuit, your not listening to the ground as such...

 

[ezer19]

Unfortunately, the omega has no volume control
Owners manual:
"Using headphones improves battery life, and also prevents the
sounds from annoying bystanders. It also allows you to hear subtle changes
in the sound more clearly, particularly if searching in a noisy location. " ...

Audio in D1 mode:
"Medium-to-high pitch tone, varying in proportion to target signal strength.
Large shallow objects will produce a squeal. The variable audio pitch provides you
more information about the detected object. Volume and Pitch increase with increase in signal strength."...

there may be difficulties for me here when translating from English to German.
but I read out exactly what I meant.

 

[Centar]

Wow, I had to go check out the Omegas manual myself, no volume control!
With detectors like this I see your point and I can understand why headphones would be a benefit with this unit (or any analog unit).
Guess it depends on the MD model one has weather headphones are useful or not (besides privacy and noisy places)

 

[Slim_Pickins]

being an older coin shooter etc. I have been dwelling on this very same topic.
I have been thinking if there is a way to build a small graphic eq to modulate the higher toned signals and reduce the volume of junk signals.
Years ago I had purchased a small amp that plugged into my headphone jack on the md and allowed me to plug my headphones into it.
It worked ok but did not allow signal discrimination. Anyone got any suggestions?

 

[airscapes]

A set of these, with an inline volume control.. removing all the outside noise and putting quality drivers in the ear will let you hear everything even with hearing loss. Etymotic Research, Inc. - hf5? earphones