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Memory enhancer circuit

The memory is the main input signal by the seeing and hearing. According to some scholars to statistics, the eye can see only 20% of live memory, ears to hear can only remember 15%. If you combine the eyes and ears, memory efficiency is more improved, and read out loud better than reading silently.
Shown in Figure is a memory enhancer schematic way, in essence, is an audio power amplifier. When the user when wearing headphones, external noise is excluded, giving the result in a quiet learning environment. When the user Duizhuohuatong read softly, the microphone will pick up the sound into the audio current, amplified by the amplifier circuit broadcast from the headset so that the "listen" "footprint" be strengthened.

When installed correctly, the circuit generally do not need adjustment. SL34 pin to ground potential of the Annex. Place the headset over the head, adjust the sound of RP so that the headset can be the right size.
This circuit can be used as part of the radio PA, XJ1 the external input jack, XJ2 the output jack, XJ3 the external power jack, XJ4 the headphone jack.

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Memory enhancer circuit