RUBHY is a Wi-Fi remotely-controlled buoy offering a range of applications in the field of underwater noise measurements.
It acquires data from 4 wide-band hydrophones and simultaneously sends and displays real-time noise information such as SEL, SPL and 3rd octave band levels within a 10 km range.

This is a robust buoy particularly suited to offshore conditions that is an excellent solution for autonomous real-time noise surveying of harbor construction, pile-driving operations and seismic surveys. With less than 350 kg, it is easily deployed and recovered from a working boat. Rugged buoy RUBHY can be deployed for real-time studies (up to 40 days of non-stop recording) in rough seas (up to sea-state 5). Many options are available and additional sensors can be added.

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THE ADVENT OF ACOUSTIC DETECTION BY ARTIFICAL INTELLIGENCE

RUBHY is a proven powerful tool for monitoring the underwater noise, but how can it be enhanced to detect autonomously various sounds from different sources (human activity, underwater species, etc), and this without the need of a 24/7 analysis by a PAM operator behind a computer?

The automatic detection by RUBHY^AI includes the ambient noise study, assessing the noise level in the relevant frequency bands and identifying the sources responsible for the noise (anthropogenic, meteorological, biological); the detection, classification and enumeration of animal sounds for cetaceans like odontocetes or mysticetes; and the assessment of the effects of noise on wildlife. Specifically talking about cetaceans, the algorithm can detect the presence of cetacean sounds in the hydrophone capture radius (~ 20 km for mysticetes, ~ 1.5 km for delphinid clicks, ~ 1 km for delphinid whistles). Four detectors can be applied: vocalization, upcall, whistles, and delphinid clicks.

• Real-time underwater noise monitoring
• Up to 4 hydrophones inputs
• Broadband: 3 Hz up to over 500 kHz
• AI sound analysis
• Multiparameter buoy: temperature, pressure, conductivity, O², pH, turbidity, salinity…
• UHF, wifi, iridium, 4G

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REMHY is a Wi-Fi surface buoy that leads the way to a new range of application for underwater noise measurements. It can simultaneously acquire data from 4 wide-band hydrophones of variable cable length. This buoy accepts both passive and preamplified active hydrophones and its wide band analog input allows up to 1 MHz with a dynamic range greater than 100 dB therefore guaranteeing an efficient signal to noise ratio. The embedded digital signal processor allows high speed acquisition filtering while users can stream data and launch or stop recordings up to a distance of 700 m.

REMHY can be easily deployed and recovered by a single person.

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