Sound Sleuth Hydrophone Build
Vložit
- čas přidán 22. 08. 2024
- This is my Hydrophone Build. It is the video portion of an Instructable.
www.instructab...
The Piezo cylinder is this: www.steminc.co...
The fully populated PCB is here: www.jlielectro...
The hydrophones are world class, very low noise with a frequency response extending greater than 100 Khz. - Hudba
"Do not embed these without testing!"
Jules, I just want to let you know that you're quite an inspiration, thank you.
Thank you!
@@SoundSleuth Dear Jules, did you manage to find a piezo cylinder provider within the EU? Merry Christmas.
@@JulesMarz I have not yet. I have a thought...
Cool!
I'd love to build some of these to place in our hotspring-fed ponds, to hear the bubbles from the gasses being released from the Earth.
If you do would love to hear the results!!!
surely this will make it in someone's "oddly satisfying video" compilation
This is excellent work. Well done.
Thank you!
great job / work, very cool.
I feel like I should mention that the air bubbles slightly effect performance, the air voids change the acoustic impedance of the potting material by causing discontinues in the path the waves make thru the water. This is generally only an issues if the size of the bubbles are close to the wavelength of the wave in the medium. Since you are using audio band, probably doesn't matter as you say.
Possibly another thing to mention is that the potting you want to use should have a similar acoustic impedance to water, so that most of the received energy passes thru the acoustic interface.
Thanks, you are correct. The air bubbles effects really matter for ultrasonics and power transducers. The density of the resin being close to water keeps the acoustic impedance similar. In the Navy, they used more of a rubber coating, going for durability more than impedance.
Interesting sound, a great idea for sound design. Cool development!
Yay! I've been waiting for this one!
Ditto!
Amazing concept, I had never heard of such thing as a hydrophone before!
Never watched a submarine movie, or known anyone on a ship?
I love these builds! I'd love to see you take a crack at an DIY RF Bias Shotgun Mic
A shotgun mic is on my list!
@@SoundSleuth If you made it an RF bias condenser you would be my savior! There are so few of them and for people like me who live in a humid and salty area, they are almost a requirement at times. Keep it up though!
Bark sent me over! 😃 This is pretty cool. I drive by a river up in Wyoming that has rapids that are pretty easy to get to. I think that would be a fun place to test these. Maybe even one on one channel then a mic above water and do some kind of mix with the video of the rapids. Thanks!
That would be great!
Thanks ! Very interesting.
Hackaday brought me here
These are really cool I want to make something out of one of these!
These sound great, well worth the $16(!) piezo element. Given that the element end is unshielded, have you encountered any issues with EMI?
I have when they are not submerged. Adding a ground lead that is exposed to the liquid makes them EMI free. Remember, there is not an RF/EMI problem underwater.
Just received the Piezo cylinder and the pre-amp pcb. Cable and connector next. I'll airspace the element center as suggested and add a ground stub. I'm landlocked here, but one of things I'll be testing is to lower it into a dug well and see and many seismic signals might be coupled in from the surrounding ground. Another use will be as a Contact Mic for various things. Anything else I need to know before the actual build?
Just test before embedding
@@SoundSleuth I will do that :-). I saw on "instructables" that there was a question of whether to leave the airspace in the piezo ring open, or pot it too. Any thought on that?
@@festeradams3972I plan on building all of mine with an airspace moving forward
@@SoundSleuth Will do...
Do you have to seal the peices in a bulky fixture like the resin bulb you have? Or could they be sealed inside plasti-dip and left with voids(speaking to the mic specifically)? The mics you are using are very interesting as I have never seen them before.
These sound great. I'm pretty familiar with the JRF and Aquarian Audio H2A hydrophones and your DIY mics sound, dare I say, better (though I'd need to hear more examples to be sure). I watched two of your other videos, the drop rig one and episode 17 (I think) where you're out swimming. The mid and highs sound so good but I was surprised at the absence of low end, especially when there are people swimming with large strokes, or paddling a kayak. There was also a motor boat pass by at some point where I would have expected much more low end. But maybe it's all just a coincidence with these particular examples. Has this been your experience with these hydrophones, the lack of low? If these can capture nice full low frequency content as well, I'm totally sold. The JRF sounds ok with an impedance transformer but are still very mid range forward with a lack of high end. The H2A is a bit better in the mids and lows but really lacks a nice high frequency response. Anyway, great video and great sounding mics. Thanks so much.
thank you for sharing this. if you ever decide to sell your pre made diy hydrophones, i would be happy to order a couple
Very nice design. One question: it looks like your phantom blocking capacitors are 10-v rated parts. Are those adequate to withstand 48V phantom power, or is your external recorder/preamp supplying a lower phantom voltage?
Yikes, those should be higher. Let me double check some things...
This is the one needed. www.mouser.com/ProductDetail/Nichicon/UWH1H220MCL1GS?qs=6KhNe6Nhnot8wz5l1XqBFw%3D%3D
Excellent - thank you! I was going by the BOM in the Instructables article and the Panasonic part listed there was the lower-rated one. I did run a parametric search for a 50v part with the correct footprint for the PCB on DigiKey's site but that only turned up one obsolete part. Very much looking forward to experimenting with a couple of these, once the present parts shortages are (hopefully) behind us. I've never seen anything like these shortages in 30 years of involvement with electronics. Thank you for making your work available on these, and your other audio / mic projects.
@@WorldPowerLabs real world you need 25V. I’m ordering 35V MLCC ones and will report back. My prototypes were built by PCB way and used the 10V parts 🙁. Will rework the ones I have that aren’t embedded yet
Is there a reason you used cylinder piezos instead of a disk?
The cylinders are similar to what the Navy uses in towed arrays, and there it kind of makes sense, but is there a specific reason for cylinders in your single phone applications?
The towed arrays are multiple versions of the single one, just spaced out. Similar to a microphone array vs a single mic. The cylinder works really well as a transducer in water. Discs work really well as contact mics and attached to things the flex them. The cylinders compress and decompress.
@@SoundSleuth is there a reason the cylinder works better in water?
Yes, the cyclinder picks up the acoustic energy in water via compression and expansion of the cylinder. It is more efficient than a disc in water. @@magicstix0r
Very cool.
I hope I am not disturbing you, however due to constraints of time I was hoping to tap into your skills and videographers skills. I caught your video on hydrophones (DIY). While observing the construction techniques I said to myself "woooo, Which of course led me to subscribe and to download your available videos.I myself was in the navy, operations specialist on the coral sea, and while the medium is different it does result in energy being absorbed by a receiving device. I was accepted to Woods hole, but life doesn't always agree with our plans, today.I have sent away for the two shown piezo cylinders, and will shortly order the rest of the device you have shown in the video. I do not have a 3d printer so i'll have to procure that from another source.On the topic of aquatic sounds, recording them is a new avenue for me, but I have downloaded and will read all the literature shown at the sites you listed.
My questions are (great plausible video) the device mentioned (shown) the frequencies it can record, I am looking at the manufacturer's spec's (which currently allude me) can the preamp/ opamp be adjusted to bring the inaudible to an audible range? And if so, have you already done so?In the video where you took the system out for the proverbial spin I did hear some variation in sounds, but i am currently assuming it may have been a simple cavitation from swim fins? Any tidbits would be helpful as I had said I am a little short on time (64.5 years old)thanks for your time Dave J.L
Just emailed you.
@@SoundSleuth Hello, no email found, but waiting, perhaps a deluge of mail! I did look, down load the article in instructibles, the board still appears to use the lower grade capacitor?
@@njvikings1 not sure what you mean by “lower grade”. The two coupling caps need to be 35VDC or higher.
After seining for what kind of ASMR content binaural microphones get used mainly i’m interested to see where dish microphones end up. :P
Thanks for video. Do you think it will work without preamp board but directly in Triton audio Piezo ? I’m using my barcus berry with these pre and it sounds great
Yes it will. Use a coax cable more than a mic cable. single conductor shielded. It is more finicky with interference as there is no shielding to it but it totally works. Just the piezo cylinder molded into resin with attached cable.
❤great play. Spent some time as a sub sailor aboard USS Pintado SSN 672. Since my discharge in ‘82 I been wanting to build a replica complete with sonar. What do you think? From your link I found a crystal with a 2 mm diameter.
I wish I knew this 3 years ago :(
I have a question: The piezo element you chose seems to pickup all frecuency range but specially the higher ranges and ultrasounds, hydrophones like the Aquarian H2D have lower frecuency response and give a darker/"rumble" sound to the hydrophones, how can I achieve this ? What piezo element would work better for those purposes?
This is an interesting one. My hydrophone has a pretty flat frequency response and does pick lower frequencies. If you want to focus on those, you can use a lowpass filter to just bring those through.
This is great I’m on the west coast of Canada have a 40 boat sit up for recording, I’ve ordered the tubes and pre amp, can you suggest a speaker that could be used in the water ?
not sure about in water speaker. you could use one of the Piezo cylinders, but you would need different amplifier.
why do you want to put a speaker in the water?🤔
..amazing video, great project..its a bummer that the piezo pieces are high cost shipping to europe..what are the exact specs for these? maybe I could find smthng here in europe..
Can I use this to detect and track allied shipping?
Why yes you can!
This doesn't seem like it'd be able to distinguish direction of sound though? Only distance? Could two of them be paired up facing different directions to production directional information?
In water you can use arrival time to determine direction. It’s actually easier in water than in air due to how sound travels in a fluid.
@@SoundSleuth From what I've read during WW1 one of the biggest issues was that their hydrophones could only decipher the distance to a target, not the direction, until they added a special transducer that could move in different directions allowing for pickup of the direction the sound came from? This is just a single microphone, no? How would it have directional information?
@@izaicslinux6961 one can’t. That’s why I built two. In the navy we had spherical arrays and then had a towed array that we could stream behind us that had multiple transducers. Then it’s just math for time aligning or phase determination.
@@SoundSleuth Ah, neat! Thanks for the info!
Do you know what the power draw on these is?
@@Jack-tv2ye about 7-8ma total
Hi, Can you just use a Piezo Pickup for musical instrument and just encase it in resin? Great video !
You can. Not sure how well it would sound but it will work for sure!
@@SoundSleuth Thanks, Worthwhile experiment to do. I asked because i noticed that the Pre amp board are for contact mics and piezo pick ups.
@@dale3341 The board makes a fantastic piezo pickup. My son uses one on his Cello. I'm going to write that one up shortly.
@@SoundSleuth looking forward for that video
Is it can be used as a sonar?
In essence it is passive sonar. The transducer can be used for lower power sonar. See the data sheet here: www.steminc.com/PZT/en/piezo-ceramic-cylinder-26x22x13mm-43-khz
Tjhe make other piezo elements that can handle more power as the transmitter underwater.
Do you have a link or part number to the zener diode you used? I didnt see it in the BOM. Thanks. Got my boards in and my piezo and am excited to do some water testing as well as hook it up to my DSA and peek at the phase response and see how linear it is
Im working on an updated one. I had some glitches with an under rated Capacitor. I WILL have one shortly
@@SoundSleuth thanks so much! Hope It didn’t feel like I was rushing you. Really amazing work and I’m excited to build this!
Question. And here in the XLR connector you did not solder two 22nF capacitors are for RF/EMI
Ahh, glad you noticed. Because the Hydrophones are submerged they don't pick up anything the way that an "Airborne" transducer.
@@SoundSleuth Understood. And if you use this board for contact microphones based on a Piezo plate? I understand that the preamplifier can cope with such a task, because in fact it is the same thing. The hydrophone picks up water vibrations, the contact microphone vibrates a solid surface.
@@fastunovaudio Yes, it can be used with Piezo Discs. Then you would want the 22nF caps.
@@SoundSleuth Super, I got it all
@@fastunovaudio @Sound Sleuth Hey! In which capacitors should I use 22nf for if I want to use Piezo Discs?
Want to build this, but was wondering if the pcb is still the same, or if you’d recommend a new one bc of the xlr issue.
There isn’t an XLR issue. I do need to come up with a shielding solution for the molding. Stay tuned!
@@SoundSleuth i just meant the issue with the phantom blocking capacitors. I was wondering if you still recommended that same PCB board and what needed to be changed, since I wasn’t clear. Looking forward to building this for myself, but if all goes well, using it as a classroom project next year for an experimental documentary course I’m teaching!
@@andrewv.uroskie7856 yes! Resolved
Hello nice video , i have question this hydrophone can hear on a frequency of 1hz to 16 hz ?
Probably but attenuated. The electronics have an inherent 8hz or so -3dB point.
@@SoundSleuth if i can get a good electronic board the result can be better ? Sorry then i ask to much , but i have a small project ... I need to make a infrasound mic and a infrasound emitter the hydrophone should be available of hear 1hz to 20hz also the emitter need to transmit 1hz to 30 hz if possible !
@@mostwantedmes email
Me ryckebusch at gmail dot com
@@SoundSleuth i send you an mail waiting for you respond .
@@mostwantedmes havent gotten it yet. ryckebusch@gmail.com
Hi where can I buy these components please
See the info section of the CZcams video and please look at the associated Instructable. All the info is there.
I was going to buy a boat and I promised my children a boat but my wife spent all the money. Children are very disappointed. What do I do now?
What's the frequency response like?
havent measured it but goes ultra sonic easily to 100Khz +
That music made this instruction much harder to pay attention to it was very loud and distracting - please don't do that in future.
Ive started doing that. ;-)
did you have to make a creepy intro..?