Timeline for Problem with simple sound detection circuit using a microphone
Current License: CC BY-SA 3.0
18 events
| when toggle format | what | by | license | comment | |
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| Aug 30, 2017 at 18:33 | answer | added | VE7JRO | timeline score: 1 | |
| Feb 12, 2017 at 4:50 | history | edited | dda | CC BY-SA 3.0 |
deleted 13 characters in body; edited title
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| Feb 12, 2017 at 2:16 | history | bumped | Community Bot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jan 12, 2017 at 23:42 | history | bumped | Community Bot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Dec 13, 2016 at 23:20 | history | bumped | Community Bot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Nov 13, 2016 at 22:53 | history | bumped | Community Bot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Oct 15, 2016 at 16:06 | comment | added | Chris Stratton | The presence of 0 or 1023 in the data indicates clipping, which is to say that signal (or noise or interference) has hit the limit of and probably exceeded the voltage range which the ADC can handle, so the gain needs to be reduced so that "normal" inputs only produce unclipped samples. But as already pointed out, the sampling rate is really too low and inconsistent. | |
| Oct 14, 2016 at 22:29 | answer | added | Nick Gammon ♦ | timeline score: 2 | |
| Oct 14, 2016 at 21:55 | comment | added | Majenko | Another thing: you can't print to serial whilst at the same time monitor the audio. You are only seeing very short snatches of sound in between your serial prints. Like if you stick your fingers in your ears, then pull them out and put them back in again very quickly. You just get short snatches of sound that make no sense. | |
| Oct 14, 2016 at 21:54 | comment | added | Majenko | The one thing you are missing in your thinking is time. During what period must the volume rise above a certain loudness to be counted? Also, you should know that the opposite must be true - not only rising above a certain value but falling below a certain value is just as loud. | |
| Oct 14, 2016 at 21:52 | comment | added | 95_96 | could you recommend something to read . i was expecting to light the led above a certain loudness. i can see though the similarities between this and a wave ( periodical 1023 and 0s ).Also what am i getting as the input then ?? | |
| Oct 14, 2016 at 21:41 | comment | added | Majenko | I mean electrically. When you view it on an oscilloscope, or as a WAV or MP3 file in, say, audacity. It's a long sequence of discrete voltages at different points in time. That is what you are seeing. Discrete voltages at different points in time. That "module" is a microphone and amplifier. Nothing more. It is up to you to process those values to do something meaningful with them. | |
| S Oct 14, 2016 at 21:41 | history | suggested | Dat Ha | CC BY-SA 3.0 |
grammar and pictures
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| Oct 14, 2016 at 21:39 | comment | added | 95_96 | i understand it is made up of rarefactions and compressions . what i was expecting this device to do was show approx loudness though(intensity if i am correct) . | |
| Oct 14, 2016 at 21:37 | review | Suggested edits | |||
| S Oct 14, 2016 at 21:41 | |||||
| Oct 14, 2016 at 21:35 | review | First posts | |||
| Oct 15, 2016 at 7:47 | |||||
| Oct 14, 2016 at 21:33 | comment | added | Majenko | Do you know what a sound wave looks like? | |
| Oct 14, 2016 at 21:30 | history | asked | 95_96 | CC BY-SA 3.0 |