Subject:
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Re: NXT Sound Sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 5 May 2006 22:35:07 GMT
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Viewed:
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6700 times
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In lugnet.robotics, Ross Crawford wrote:
> Hmmm is there a "raw data" mode for the sound sensor?
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.
> Seems to me, it may be possible... to write a program
> that does FFT analysis, as long as it can get the raw
> wave data from the sensor.
You only have the raw "level" data, and even then the time resolution is poor
for something like an FFT of a human voice. *And*, switching between modes (dB
to dBA and back again) takes a significantly longer delay than the normal
sampling interval.
--
Brian Davis
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Message is in Reply To:
 | | Re: NXT Sound Sensor
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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" (...) (20 years ago, 5-May-06, to lugnet.robotics)
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