Timeline for How to completely remove upper frequencies from a vocalization?
Current License: CC BY-SA 4.0
18 events
| when toggle format | what | by | license | comment | |
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| Jul 4, 2022 at 8:24 | vote | accept | Potichien | ||
| Jun 27, 2022 at 8:39 | history | edited | Potichien | CC BY-SA 4.0 |
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| Jun 24, 2022 at 22:49 | answer | added | Taiki Sakai | timeline score: 6 | |
| Jun 24, 2022 at 13:20 | comment | added | Potichien | Thank you @Thejasvi, so with the power spectrum, energy has drastically reduced above 5000 Hz but we can still see the harmonics, like on the spectrogram. BUT this made me realise that the original call is clipped, i.e. it was too loud for the mic. Could it be the problem? I see here (wildlifeacoustics.com/glossary/clipping) that it can distord harmonics! | |
| Jun 24, 2022 at 13:06 | comment | added | Potichien | Thank you very much @selene, I have edited the question! (I used a bandpass filter, from 0 to 5000 Hz) | |
| Jun 24, 2022 at 13:03 | history | edited | Potichien | CC BY-SA 4.0 |
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| Jun 23, 2022 at 21:37 | comment | added | Thejasvi | Spectrograms can be useful for quick checks - though I'm always a bit concerned as some programs have very large dynamic ranges (60-80 dB), that are set relative to the maximum 'pixel' value. This means, even after heavy filtering it may appear like the high-frequency content is still 'lingering' around, even though most of it is gone. Have you tried looking at the power spectrum of the signals before/after filtering to check if things are as expected? | |
| Jun 23, 2022 at 19:44 | answer | added | B. Thomas | timeline score: 8 | |
| Jun 23, 2022 at 19:27 | comment | added | selene | @potichien could you put in exactly what filter settings you used in Raven? | |
| S Jun 23, 2022 at 19:14 | history | suggested | selene |
fixed spelling of "filter" tag
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| Jun 23, 2022 at 18:50 | comment | added | selene | thanks for the update edit - I'll reach out to Raven support (who have joined this site) and see if they can't give more insight | |
| Jun 23, 2022 at 18:48 | review | Suggested edits | |||
| S Jun 23, 2022 at 19:14 | |||||
| Jun 23, 2022 at 18:08 | comment | added | TomCLewis | I'd be interested to know what program you are using for the analysis? I use R and the functions I use to extract features (specan and mfcc_stats in the warlbeR package) allow you to set the frequency range you want. Otherwise in Raven you can use a bandpass filter to remove any frequency ranges you don't want. | |
| Jun 23, 2022 at 16:53 | history | edited | Potichien | CC BY-SA 4.0 |
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| Jun 23, 2022 at 16:44 | history | edited | Potichien | CC BY-SA 4.0 |
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| Jun 23, 2022 at 14:24 | answer | added | Noil | timeline score: 8 | |
| S Jun 23, 2022 at 14:08 | review | First questions | |||
| Jun 30, 2022 at 10:35 | |||||
| S Jun 23, 2022 at 14:08 | history | asked | Potichien | CC BY-SA 4.0 |