 | | NXT Sound Sensor —Tim Byrne
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| | | The LEGO Education blog had some information a while ago on the NXT sound sensor. In addition to distinguishing decibel levels, they mentioned it featured "tone recognition". Can someone in the know comment on this feature. Can the sound sensor (...) (19 years ago, 5-May-06, to lugnet.robotics)
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| | | | | Re: NXT Sound Sensor —Brian Davis
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| | | | (...) Which it does pretty well, maxing out around 100 dB. (...) Not as much (yet!) as I'd like. The sound sensor has two modes familier to folks who work with dB noise levels. One is a "flat" frequency response curve, and one is a frequency (...) (19 years ago, 5-May-06, to lugnet.robotics)
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| | | | | | Re: NXT Sound Sensor —Ross Crawford
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| | | | (...) Hmmm is there a "raw data" mode for the sound sensor? Seems to me, it may be possible (maybe not yet but one day) to write a program that does FFT analysis, as long as it can get the raw wave data from the sensor. I'm assuming the "tone mode" (...) (19 years ago, 5-May-06, to lugnet.robotics)
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| | | | | | Re: NXT Sound Sensor —Brian Davis
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| | | | | (...) The raw mode still just returns one number - essentially the integrated sound energy, where the weighting function is determined by the sensor mode (dB or dBA) and is all done on-board the sound sensor itself, not in the NXT. (...) You only (...) (19 years ago, 5-May-06, to lugnet.robotics)
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| | | | | | Re: NXT Sound Sensor —John Barnes
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| | | | (...) There is a curious 6th wire connection from the sound sensor which sends analog sound to the CPU. I am assuming that using some 3rd party firmware, it might be possible to digitize and process sound data. But I think turning the CPU into a DSP (...) (19 years ago, 6-May-06, to lugnet.robotics)
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| | | | | | Re: NXT Sound Sensor —Philippe Hurbain
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| | | | (...) I agree about high grade DSP, but frequency discrimination may be quite possible... in the past we had a product based on a puny 8MHz 80C188 that was able to run ISDN stack, transfer 64 kbits/s data on one channel, 64 kbits/s voice on the (...) (19 years ago, 6-May-06, to lugnet.robotics)
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