Protection against sound piracy by microphones
AssigneeTruelight Technologies, LLC
InventorAngel DeCegama
Life of this patent
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Abstract
Aspects of this invention include devices and methods for protecting acoustic signals from being pirated by a microphone. Such devices include a signal generator adapted to produce acoustic signals (“aliasing signals”) having frequencies greater than about ½ of the sampling frequency of the microphone Methods for protecting against piracy include providing an acoustical signal within the range of frequencies of normal human hearing to be protected, and a second signal having frequencies above about ½ the sampling frequency of the microphone. Additional aspects include amplifiers for aliasing frequencies and housings for both acoustical signal and aliasing signals.
Claims19
A method for protecting against microphone audio piracy, comprising:
- (a) providing a first audio signal to be protected, having a range of audio frequencies within the range of human hearing;
- (b) providing a second acoustical signal having a second frequency above the range of human hearing, wherein the frequency above the range of human hearing is greater than about ½ of the sampling rate of said microphone.
A device for protecting against microphone audio piracy, comprising:
- a signal generator adapted to produce a signal having a frequency above the range of human hearing;
- an air transducer;
- and
- a speaker for producing an audio signal to be protected.
A method for protecting against music piracy, comprising:
- (a) providing a music file containing a signal having a frequency above that of the range of human hearing;
- and
- (b) providing a music player having a filter to remove from said file, said signal having a frequency above that of the range of human hearing.
A music player for playing an audio file containing a signal having a frequency above the range of human hearing, comprising:
- a music player;
- and
- a processor having a program that subtracts from said audio file, said signal that has a frequency above the range of human hearing.
A system for transmission of audio files across a network, comprising:
- a device for producing a digitized file containing an audio signal;
- a digitized file containing a sample of digitized audio signal;
- a sample containing a frequency above the range of human hearing;
- a communication device to transmit said digitized file to a user;
- and
- a player to play back said file, said player having a filter to remove from said file, said sample containing said frequency above the range of human hearing.
Dependencies are inferred from the claim text.