Subject:
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Re: NXT sound sensor characteristics
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Newsgroups:
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lugnet.robotics, lugnet.boats
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Date:
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Sat, 28 Feb 2009 16:12:16 GMT
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Viewed:
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31527 times
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> That sounds like resonance. Perhaps in the sensor response, but at 3 kHz the
> wavelength is down around 10 cm, meaning a half-wavelength at 5 cm is getting
> very close to the physical dimensions of the sensor. Did you check for physical
> resonance effects, perhaps within the casework?
Excellent suggestion!!! We'll open one sensor and try once again.
> ...I'd love to, but don't have the signal generator right now. I'm very tempted
> to get something like this:
> http://www.pasco.com/featured-products/xplorer-glx/index.cfm
B.t.w. Vernier also has a remarkable device:
http://www.vernier.com/labquest/
Someone else interested in repeating the experiment? Philo?
Claude
P.S. I added a graph to the page, where the sound pressure is maintained
constant.
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Message has 2 Replies:
 | | Re: NXT sound sensor characteristics
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| (...) due to who's catalog arrived at my house first. They look almost identical in functionality except the LabQuest has a stylus and more memory, while the XplorerGLX has I2C sensors (or seomthing like them; it seems they transmit digital (...) (18 years ago, 1-Mar-09, to lugnet.robotics, lugnet.boats)
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Message is in Reply To:
| | Re: NXT sound sensor characteristics
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| (...) Since I was doing this all manually, it was by far the easiest. I realized that a better way would be to vary the signal generator level at each frequency, but often when trying that I simple "maxed out" the reported level from the sound (...) (18 years ago, 28-Feb-09, to lugnet.robotics, lugnet.boats)
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