Hello all, I have been wanting to install a hydrophone on my BR ROV and wonder if anyone else has experimented with one? My purpose is to “listen” to the distinct sounds of the Vaquita porpoise that is the rarest of marine mammals (about 10-12 left on the planet) that are only found in the Upper G…

Hi Mike - I saw your email on this topic, but just to share publicly, ACbotics has many solutions that may be better for your application than the DIY approach!

How about an approximate price?

I believe there are solutions available for less than $800, but I’d recommend reaching out to the vendor!

The University of Maryland has a program that uses fixed hydrophones in the Chesapeake for studying Dolphins. That may be a place to look further for more resources.

But they are limited by the frequency range…up to 90 kHz. My project needs a hydrophone that can detect up to 150 kHz.

Maybe this option fits the application?

You do know how loud the BlueROV2 is, Right? You won’t be able to hear anything while the thrusters are armed. Even the stepper motor in the Ping360 sonar can be heard by my GoPro camera. I own a Aquarian Audio H2a-XLR, but their hydrophones are only rated (tested?) up to 100 KHz. Maybe you could …

Great point @btrue ! We’ve seen customers doing research with the Blue ROV2 and hydrophones take a drive and drift technique. If the ROV is tuned to be very close to neutrally buoyant, you can drive some distance, disarm, and listen for a period of time. Tricky for sure!

As I stated the sounds I am detecting are much higher frequency (120-150 kHz) that our hearing range. So I don’t worry about the thruster noise.

Use of a hydrophone on the ROV?

General Discussion

bajaMike (Mike Bennett) April 24, 2024, 5:30pm 2

Looks like I will try using a DAQ/HAT on a Raspberry Pi mounted inside a separate enclosure. This won’t give me real-time monitoring of the sound data, but a passive collection of data.

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Use of a hydrophone on the ROV?

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Use of a hydrophone on the ROV?

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