Timeline for How can we explain the broad features of this guitar spectrogram?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Jul 10, 2020 at 19:06 | vote | accept | Kai | ||
| Jul 10, 2020 at 16:06 | comment | added | alephzero | For the "Gaussian/Lorentzian behavour of the peaks", you need to read a book on practical signal processing and topics like "system identification" in control theory or experimental modal analysis - which are very different subjects from "theoretical uses of Fourier transformations in physics". | |
| Jul 10, 2020 at 16:03 | comment | added | alephzero | The damping ratio is different for different modes. (If there was no damping, there would be no sound produced by the string, or more accurately by the vibration of the entire guitar body for an acoustic guitar!) BTW if you want to produce better quality data for the frequency peaks (and damping ratios) Fourier analysis is the wrong tool. Methods based on autocorrelation functions don't need a windowing function, can measure both frequency and damping for each mode, and can track things like the change of modal frequency with amplitude for a real vibrating system. | |
| Jul 10, 2020 at 15:55 | comment | added | Kai | Fascinating, I had not considered this, certainly, a proper analysis would require high-quality recording equipment, low background noise, and proper background subtraction. Any insight one whether we might expect Gaussian/Lorentzian behavior of the peaks or about why the fundamental peak appears to be significantly reduced? | |
| Jul 10, 2020 at 15:48 | history | answered | alephzero | CC BY-SA 4.0 |