Post AtQJW5X3YmlxAf00Ui by davidrevoy@framapiaf.org
(DIR) More posts by davidrevoy@framapiaf.org
(DIR) Post #AtQCgrXTEBkrHHNp7A by davidrevoy@framapiaf.org
2025-04-24T16:32:38Z
2 likes, 1 repeats
A DIY digital stethoscope for cats New blog-post: https://www.davidrevoy.com/article1075/diy-digital-stethoscope-for-cats#cat #diy #audacity
(DIR) Post #AtQD0jz31lqZdZlF8y by ElectroFetish@mastodon.social
2025-04-24T16:36:15Z
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@davidrevoy over cute!
(DIR) Post #AtQEhVq7aeW4B1Xq6K by kpmy@m.ocsf.in
2025-04-24T16:55:10Z
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@davidrevoy got sum' purr audio drugs? 💉
(DIR) Post #AtQFI6vv9eM5e4i0em by Proton25@mastodon.social
2025-04-24T17:01:38Z
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@davidrevoy You may want to apply a lowpass filter on the recorded audio. The heartbeat is only several hundred Hz and you don't need the noise at higher frequencies. Try a 1 KHz lowpass filter and see what the recording looks like. It may make counting easier. You can play with the value until you get a good result.If you are feeling a little motivated, you can use Blender to help you with the counting using a Python script...
(DIR) Post #AtQFl42iynM54yhHyC by irina@wandering.shop
2025-04-24T17:06:27Z
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@davidrevoy Wow, that's so cool!
(DIR) Post #AtQG20g2kMhLYzAW24 by devSJR@fosstodon.org
2025-04-24T17:10:05Z
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@davidrevoyYou have the audacity to record a cat?
(DIR) Post #AtQGBEiduOeLigmfUu by Xalofar@shelter.moe
2025-04-24T17:11:45Z
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@davidrevoy OoEt on peut vraiment s'en servir comme stéthoscope?!?
(DIR) Post #AtQGjqCx24PnpqSf2W by davidrevoy@framapiaf.org
2025-04-24T17:18:01Z
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@devSJR 🤣 👍
(DIR) Post #AtQGvmoRTw6EmPh3DM by davidrevoy@framapiaf.org
2025-04-24T17:20:10Z
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@Xalofar Tout à fait, ça marche bien. Je me disais que si un⋅e streameur⋅e gaming horror/suspens se collait ça en source audio dans OBS, ça pourrait vivement communiquer sur les moments de réel flip.
(DIR) Post #AtQHHl7KSwU3tP0MkK by nightdream@sfba.social
2025-04-24T17:24:06Z
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@davidrevoy Thanks for this! The whole reason I even possess a stethoscope is cats!
(DIR) Post #AtQHKDLQUK4m18llp2 by trucy@girlcock.club
2025-04-24T16:37:35Z
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@davidrevoy woah, congrats! There’s probably a way to detect those spikes and count them, but that might be over-engineering (aka: fun)
(DIR) Post #AtQHKDo8lZ2pSCChZw by vfrmedia@social.tchncs.de
2025-04-24T17:09:40Z
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@trucy @davidrevoy I guess this is multispecies, and could equally work for dogs (and humans?)
(DIR) Post #AtQHKETcHMDnWpbpE8 by davidrevoy@framapiaf.org
2025-04-24T17:24:25Z
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@vfrmedia @trucy Yes, probably multi-species. Human and Cat confirmed. Dog sounds like a solid assomption to do. 😆
(DIR) Post #AtQICvNqy3U6EvzbX6 by davidrevoy@framapiaf.org
2025-04-24T17:34:30Z
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@Proton25 Thank you very much for the tips. Yes, I tried various filters in Audacity in case a EQ or something could make the result easier to count, but it's not really working. But for sure, if I want to automatize, Simplifying the audio and contrasting the heartbeat is definitely the good starting point.
(DIR) Post #AtQJW5X3YmlxAf00Ui by davidrevoy@framapiaf.org
2025-04-24T17:49:01Z
1 likes, 0 repeats
@kpmy I tried! But the sound of the stethoscope is really 'from inside', it's full of infrabass, but I'm sure I could try to capture better purring session with my mic I use to capture my voice for my videos. But here is a sample of two purrs, captured with the USB Stethoscope.
(DIR) Post #AtQJcJPcroBPxOUWVE by davidrevoy@framapiaf.org
2025-04-24T17:50:16Z
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@skobkin Haha, yes, the picture for the header of the article is a bit confusing for the positioning. 😆 In the article, I show where I position it (between the front leg, under him).
(DIR) Post #AtQJu2ertgNlCv4iLA by davidrevoy@framapiaf.org
2025-04-24T17:53:24Z
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@astrovore Thank you for the clicker idea. I might give it another try with my fingers to get the pulse.
(DIR) Post #AtQL91S8lDEZlcpRey by profdc9@mastodon.social
2025-04-24T18:07:20Z
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@davidrevoy You can not drain all of the purr out of a cat with a device like this. The purr always is replenished.
(DIR) Post #AtQPgOGzKupLuomMka by parrot33@piaille.fr
2025-04-24T18:58:14Z
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@davidrevoy Have you tried a spectrum analysis in Audacity ? You should have a peak between 2 and 3 Hz, then multiphy it by 60.
(DIR) Post #AtQRXoZsMnuCneeUgy by davidrevoy@framapiaf.org
2025-04-24T19:19:02Z
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@parrot33 I discover with your comment the spectrogram view, very interesting alternative way to look at the data. Thank you!
(DIR) Post #AtQSFCNTkqL94BXZpo by davidrevoy@framapiaf.org
2025-04-24T19:26:51Z
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@denkodama @parrot33 Thank you! I had a check, and by visiting the 'Analyze' menu, I found a pearl: 'Beat Finder' 😍 It will be way easier to count.
(DIR) Post #AtQWi91tgImgtgVIcy by Proton25@mastodon.social
2025-04-24T20:16:39Z
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@davidrevoy This is after applying a bandpass filter and a noise gate. Much easier to count...
(DIR) Post #AtQXD0uHvnxmgLfFUu by davidrevoy@framapiaf.org
2025-04-24T20:22:35Z
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@Proton25 That looks good indeed! Can you guide me a little bit more on how to reproduce this? Thank you.
(DIR) Post #AtQYh27g4hU75wnzv6 by Proton25@mastodon.social
2025-04-24T20:39:11Z
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@davidrevoy Of course!Start out with applying a Filter Curve EQ. effect. Take out the lower frequencies below 40Hz and the high frequencies above 600Hz. This will already improve things. The final step is to apply a gate in order to remove the low volume noise. I used a Calf Gate (part of the calf plugin suit that you can find in the extra repo in Arch based distro) that I installed for my DAW and is available in Audacity. You can play around with the threshold - I used values around 0.3-0.4.
(DIR) Post #AtQdYPSISHHIcl9nge by davidrevoy@framapiaf.org
2025-04-24T21:33:12Z
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@Proton25 Thank you very much for the detailed how-to with screenshot, it will help me a lot. 👍
(DIR) Post #AtQemi4o7QZANvYLOy by Proton25@mastodon.social
2025-04-24T21:47:29Z
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@davidrevoy It is the least I could do for someone who has provided me (and others) with so much information and value for several years.
(DIR) Post #AtQisQ3yPAOE4U8myO by VE2UWY@mastodon.radio
2025-04-24T22:33:06Z
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@davidrevoy ... does the cat gave AirPods or something?
(DIR) Post #AtQqGrfe6xyQK9MiIK by AndreaKusel@digitalcourage.social
2025-04-24T23:56:12Z
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@davidrevoyThank you for the beautiful blog post!Cats, care, a diy project, and open source software, all in one post! What else could one wish for?
(DIR) Post #AtRSQFBDs0sW6L2CYK by valvin@framapiaf.org
2025-04-25T07:03:42Z
0 likes, 0 repeats
@davidrevoy oh good job ! thanks for sharing
(DIR) Post #AtRh7S713yr01IZ3y4 by ElectroFetish@mastodon.social
2025-04-25T09:48:18Z
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@davidrevoy special thanks for your easy site, which I can comfortably browse from my old Fujitsu Siemens
(DIR) Post #AtXu9M0JuGCSLqz84m by davidrevoy@framapiaf.org
2025-04-28T09:42:37Z
1 likes, 0 repeats
@denkodama :blobcheerbounce: Wohoo! So happy to see Geuloush featured on Hackaday. Cute!