Comments on: A Clap Counter MyBlock http://nxtasy.org/2006/10/14/a-clap-counter-myblock/ LEGO Mindstorms NXT Blog Forums Community Downloads Tutorials Mon, 08 Sep 2008 18:45:40 +0000 http://wordpress.org/?v=2.0.4 by: Brian Davis http://nxtasy.org/2006/10/14/a-clap-counter-myblock/#comment-1121 Thu, 19 Oct 2006 15:44:48 +0000 http://nxtasy.org/2006/10/14/a-clap-counter-myblock/#comment-1121 The dB vs. dBA weighting is done internally, within the sound sensor itself, not on-board the NXT. Sending back a good frequency spectrum, (even if the sound sensor could do it), over the NXT I2C link would be slooooow... -- Brian Davis The dB vs. dBA weighting is done internally, within the sound sensor itself, not on-board the NXT. Sending back a good frequency spectrum, (even if the sound sensor could do it), over the NXT I2C link would be slooooow…

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Brian Davis

]]> by: sivan http://nxtasy.org/2006/10/14/a-clap-counter-myblock/#comment-1061 Mon, 16 Oct 2006 17:20:10 +0000 http://nxtasy.org/2006/10/14/a-clap-counter-myblock/#comment-1061 Brian Davis made a similar comment on thenxtstep. He reported there that he can use this technique to recognize pure tones, but not not tones emitted by the speakers of the NXT and the RCX. See his comment for more details. I have not yet tried this, but I definitely plan to. Brian Davis made a similar comment on thenxtstep. He reported there that he can use this technique to recognize pure tones, but not not tones emitted by the speakers of the NXT and the RCX. See his comment for more details.

I have not yet tried this, but I definitely plan to.

]]> by: Ruari http://nxtasy.org/2006/10/14/a-clap-counter-myblock/#comment-1060 Mon, 16 Oct 2006 10:49:24 +0000 http://nxtasy.org/2006/10/14/a-clap-counter-myblock/#comment-1060 It occurs to me that if the senor can recignise both dBs and dBAs that it must most be aware of the frequency of the sound. Are the weighting for dBA done internally in the sensor or is the nxt doing the calculations. It occurs to me that if the senor can recignise both dBs and dBAs that it must most be aware of the frequency of the sound. Are the weighting for dBA done internally in the sensor or is the nxt doing the calculations.

]]> by: sivan http://nxtasy.org/2006/10/14/a-clap-counter-myblock/#comment-1055 Sat, 14 Oct 2006 17:10:55 +0000 http://nxtasy.org/2006/10/14/a-clap-counter-myblock/#comment-1055 I have not seen anything in the development kits that suggests that the sound sensor can be used to recognize tones. And as I wrote in the article, the sampling rate of the NXT's sound sensor, at least with NXT-G, is too slow to allow recognition of tones by sampling the amplitude. I have not seen anything in the development kits that suggests that the sound sensor can be used to recognize tones. And as I wrote in the article, the sampling rate of the NXT’s sound sensor, at least with NXT-G, is too slow to allow recognition of tones by sampling the amplitude.

]]> by: anonymous http://nxtasy.org/2006/10/14/a-clap-counter-myblock/#comment-1054 Sat, 14 Oct 2006 16:11:15 +0000 http://nxtasy.org/2006/10/14/a-clap-counter-myblock/#comment-1054 This notion of tone recognition is news to me. And the Lego blog entry you link to does state it has that ability. Anything in the development kits hint how to tap this feature? This notion of tone recognition is news to me. And the Lego blog entry you link to does state it has that ability. Anything in the development kits hint how to tap this feature?

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