Parametric signal processing systems and methods

摘要

A signal processing system for generating a parametric signal comprises an audio compressor, operable to compress a dynamic range of an audio input signal, and an equalization network, operable to equalize the audio signal. A low pass filter is operable to remove high portions of the audio signal and a high pass filter is operable to remove low portions of the audio signal. An oscillator circuit is operable to generate a carrier signal, and a modulation circuit is operable to combine the audio signal with the carrier signal to produce at least one modulated carrier signal.

主权项

1. A method for generating a modulated carrier signal that can be emitted as a parametric wave, comprising:
compressing a dynamic range of an audio signal to generate a compressed audio signal; equalizing the audio signal to generate an equalized audio signal; band pass filtering the audio signal to generate a filtered audio signal; and modulating a carrier signal with the compressed audio signal to generate a single sideband (“SSB”) modulated carrier signal; the single sideband (“SSB”) modulated carrier signal being of sufficient intensity so as to demodulate when emitted into a non-linear medium; wherein modulating the carrier signal includes utilizing a single oscillator circuit to drive at least a pair of modulators, each of which modulates a carrier signal with a filtered audio signal.