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I want to broadcast in AM an specific sound (noise) plus a message, using a conventional AM radio you would only listen this noise and not the message, but using the device I want to sell you will listen the message without the sound
In general terms adding a noise and suppressing it with a device I can attach-plug to a AM radio such as a circuit ore something not expensive
I need someone engineering the adding-suppressing noise technology know how, at this stage I still don't need the functional prototype
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