Just speculating, but I hinted to this a little in my above post. But it seems engine noise and road noise could be canceled out with additional microphones - mounted appropriately to pick up only noise from those sources, and then canceled out inside the car. I can imagine a few problems with that, since by the time the sound gets into the car the signal would have shifted some, but it seems possible that they would be able to figure out what the distortion would be and account for that.
This is all probably a bit sophisticated just to make it easier to listen to Backyard Boys.:)
I don't know just how sophisticated technology in these things would be, but theoretically it shouldn't be too difficult to keep an audio system from responding to commands issued by the audio file. Voice recognition is done by analyzing the signal from audio, a process known as digital signal processing. When the signal matches something the system knows to look for, the programmed response is called.
A major problem with voice recognition technology is when the technology cannot differentiate the speaker from the background noise. Not knowing what is reliable and what is noise, the system can be more prone to error. In this case, however, the system would know what it is outputting and to my thinking should be able to ignore any signal currently being output. Any incoming audio signal would be compared against the outgoing signal and if it matched it could simply be ignored. This should make it possible to eliminate noise coming from various sources, perhaps even something to detect noise outside the car and filter it out as well.
This is just my thinking.:) My DSP experience is limited to working with a group of DSP people, and my project had nothing to do with theirs. I just picked up a fact here and there.:) Still, this seems a possible solution to me.
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Just speculating, but I hinted to this a little in my above post. But it seems engine noise and road noise could be canceled out with additional microphones - mounted appropriately to pick up only noise from those sources, and then canceled out inside the car. I can imagine a few problems with that, since by the time the sound gets into the car the signal would have shifted some, but it seems possible that they would be able to figure out what the distortion would be and account for that.
:)
This is all probably a bit sophisticated just to make it easier to listen to Backyard Boys.
I don't know just how sophisticated technology in these things would be, but theoretically it shouldn't be too difficult to keep an audio system from responding to commands issued by the audio file. Voice recognition is done by analyzing the signal from audio, a process known as digital signal processing. When the signal matches something the system knows to look for, the programmed response is called.
:) My DSP experience is limited to working with a group of DSP people, and my project had nothing to do with theirs. I just picked up a fact here and there. :) Still, this seems a possible solution to me.
A major problem with voice recognition technology is when the technology cannot differentiate the speaker from the background noise. Not knowing what is reliable and what is noise, the system can be more prone to error. In this case, however, the system would know what it is outputting and to my thinking should be able to ignore any signal currently being output. Any incoming audio signal would be compared against the outgoing signal and if it matched it could simply be ignored. This should make it possible to eliminate noise coming from various sources, perhaps even something to detect noise outside the car and filter it out as well.
This is just my thinking.