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As a result of long researches of the PI metall detector with use of digital processing of the received signal was determined the following. The integration of a signal has not good sensitivity and for digital processing for the large time of discretization this method is poorly sensitive. The program of my new method allows considerably to increase sensitivity of such PI detector (even at use of a sound card with the maximal sample rate 192 000). At its use such PI detector (with digital processing at sound card) very well reacts to gold nuggets even of the small sizes.
I remind that my program can work only on portable computers with a sound card, which has a line input and SPS 192 000 and for Windows XP. New parameter in my program is designated by the letter М.
PS. For this programm I use only 2 knobs - freq and pulse width.
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