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Freshwater Soundscapes...
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Thanks, Heinz. Very interesting! Op wo 24 apr 2024 om 10:51 schreef Heinz via <heinz.hartfiel=[email protected]>: I watched an interesting?BioacousTalk today. It has nothing to do with MicBuilding, but can be inspiring for hydrophone builders and musicians. |
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Yes! these:?? they work really well and I have gotten great sounds with them as have several renown field?recording people. Jules On Wed, Jan 8, 2025 at 7:48?AM Heinz via <heinz.hartfiel=[email protected]> wrote:
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Best Regards, Jules Ryckebusch 214 399 0931 |
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Hi Jules First of all, thank you for your post and the instructions you put together to build these amazing Gladys hydrophones. Your humpback whale recording on YouTube is fantastic! Did you ever checked how your hydrophone?performs in ponds? I'm asking because David Rothenburg mentioned in the ?that he heard almost nothing when he used a hydrophone that was made for whale?recordings inside ponds. It seems that he used a special and very sensitive hydrophone for his pond recordings instead. To record sounds that are only a few meters away? A hydrophone that even picks up sounds from nearby underwater creatures and plants? I'm looking forward to experimenting! Heinz Am Mi., 8. Jan. 2025 um 22:53?Uhr schrieb Jules Ryckebusch via <ryckebusch=[email protected]>:
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Digging a little deeper, I found that the hydrophones that David Rothenberg uses for his pond recordings were originally invented and built by Zach Poff. When it comes to hydrophones,? on his website. It seems that he also used low-noise electret capsules in his . Which puzzled me a bit. Does this mean that an AOM-5024L might work underwater? I still have two left. :-) Is it really necessary to modify the front case of the capsule to allow more contact between the silicone and the diaphragm? I have a lot of respect for this step because I'm afraid of damaging the capsule. |
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Heinz, these will work fine in a pond. They are designed?almost identical to a NOAA paper on them and, like Naval Hydrophones. I have not measured the sensitivity but they are very low noise as well. Far better than encasing an electret microphone capsule.? Jules On Wed, Jan 8, 2025 at 11:54?PM Heinz via <heinz.hartfiel=[email protected]> wrote:
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Best Regards, Jules Ryckebusch 214 399 0931 |
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Thanks, Jules! I'm sure Gladys will work well in ponds. Don't you have a pond nearby? Please dipp one of your Gladys in and tell us how it sounds. Maybe you'll discover something interesting. That would be fun! I'll definitely consider Gladys. But I must admit that I'm also intrigued by Zach Poff's relatively simple DIY method. And that I'm thinking about sacrificing an AOM-5024 for a test. Many thanks! Am Do., 9. Jan. 2025 um 21:20?Uhr schrieb Jules Ryckebusch via <ryckebusch=[email protected]>:
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I have built electret hydrophones in the past. They have serious limitations. Noise/sensitivity is one. Another is the huge change in pressure on the (protected) membrane when passing from air to water. It asks for care to release this pressure. Condens is one more concern. In general, except for experimentation I wouldn't advise to use electret for hydrophones. |
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Hi Johan
Many thanks for your advice.?
I have a modest question. I own a Shadow (12mm). It sounds quite nice. Even on a classical guitars. Would it be possible to turn this pickup into a (small) hydrophone. I'm just wondering.
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Btw: I didn't forgot that you might be interested in a HM-200 (#36096). But sadly I didn't came across another one yet.
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On Fri, Jan 10, 2025 at 08:20 PM, Johan Vandermaelen wrote:
I have built electret hydrophones in the past. They have serious limitations. Noise/sensitivity is one. Another is the huge change in pressure on the (protected) membrane when passing from air to water. It asks for care to release this pressure. Condens is one more concern. In general, except for experimentation I wouldn't advise to use electret for hydrophones. |
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It looks like a piezo disk microphone. It's easy to build one for a handful of dollars. To make them watertight I use nail varnish instead of the more common plastidip. Be aware you should use an impedance adapter for best results. E.g. Triton, but I have had good results with a BSS DI. Waterinsects in a pond. This os a cheap way to start your journey. But Jules piezo with his adapter will clearly outperform my suggested - cheap- solution. Op zo 12 jan 2025 10:24 schreef Heinz via <heinz.hartfiel=[email protected]>:
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I recently discovered many small and very old ponds and would like to take a listen. Some are very small. I will try your suggestion.? I would find it a bit of a schame to use Jule's well-built hydrophones in ponds, where even wild boars sometimes wallow. From my humble opinion they're better suited for naval environments..? Am Mo., 13. Jan. 2025 um 03:41?Uhr schrieb Johan Vandermaelen via <johan.vandermaelen=[email protected]>:
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I'd love to build the Gladys Hydrophone. Any chance to get the parts or DIY kit in Europe?
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Udo Jules Ryckebusch via groups.io: Heinz, these will work fine in a pond. They are designed almost identical <ryckebusch@...>:Yes! these: they |
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You can order PCBs from PCBWay - link in Jules' instructable - and order the components locally.
It's easy to build.
Be advised - the default quantity in the order form is 5 pieces. But 10 pieces cost the same money :)
Also pay attentionbto shipping method - there are less expensive ones (though slower) than the default.
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You can also order populated PCB but it costs substantially more. You'd need to compare prices.
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The difficult part is cylindrical piezo element. These are expensive and hard to get.
But it is the best option. Top tier :) You can also use more common piezo elements. |
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