21/ Identifying Bottle Caps
I thought it would be a good idea to write a separate section on identifying the ever-present bottle cap. One reason is because firstly many caps have a nice spongy sound that can initially be mistaken for gold. Secondly, with its multiple frequencies, the Excalibur readily latches on to the varied metals that bottle caps contain. However, it is the way that the detector acquires and leaves the cap signal that makes them identifiable. The Excalibur gets its discriminate accuracy by grouping targets into the primary frequency ranges that they occupy. With a cap, these are many; meaning that the detector has to work hard to make these multiple classifications. This causes a difference in the signal tone. Caps come in one of two ways. Shallow ones sound abrupt, with multiple tones entering at once. The deeper, rusted ones are long, drawn out signal--usually more recognizable as something that is not completely non-ferrous. Both will have multiple
I thought it would be a good idea to write a separate section on identifying the ever-present bottle cap. One reason is because firstly many caps have a nice spongy sound that can initially be mistaken for gold. Secondly, with its multiple frequencies, the Excalibur readily latches on to the varied metals that bottle caps contain. However, it is the way that the detector acquires and leaves the cap signal that makes them identifiable. The Excalibur gets its discriminate accuracy by grouping targets into the primary frequency ranges that they occupy. With a cap, these are many; meaning that the detector has to work hard to make these multiple classifications. This causes a difference in the signal tone. Caps come in one of two ways. Shallow ones sound abrupt, with multiple tones entering at once. The deeper, rusted ones are long, drawn out signal--usually more recognizable as something that is not completely non-ferrous. Both will have multiple