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From a contact, posted with permission:
Here's one (likely) explanation for how the Neurophone works.
The Neurophone takes audio signals and converts them to signals that have the _slope_ of a ~40kHz wave.
The 2nd generation Neurophone then passes these signals through a two stages that mimic what happens if they were radiated by an antenna (!). (double differentiation and highpass filtering) The output of this is then converted to mechanical waves and fed into the body.
The implications of this is that we have a bit of our brain that can pick up electromagnetic radiation with 100kHz bandwidth, and process it as if it were sound. You can sort of do an end-run around it by "pretending" the signal was once "over-the-air" and feeding it in through mechanical transduction.
Here's one (likely) explanation for how the Neurophone works.
The Neurophone takes audio signals and converts them to signals that have the _slope_ of a ~40kHz wave.
The 2nd generation Neurophone then passes these signals through a two stages that mimic what happens if they were radiated by an antenna (!). (double differentiation and highpass filtering) The output of this is then converted to mechanical waves and fed into the body.
The implications of this is that we have a bit of our brain that can pick up electromagnetic radiation with 100kHz bandwidth, and process it as if it were sound. You can sort of do an end-run around it by "pretending" the signal was once "over-the-air" and feeding it in through mechanical transduction.