The Sound Emission Board of the KM3NeT Acoustic Positioning System
C. D. Llorens, M. Ardid, T. Sogorb, M. Bou--Cabo, J. A., Mart\'inez-Mora, G. Larosa, S. Adri\'an-Mart\'inez

TL;DR
This paper details the development of a sound emission board for the KM3NeT underwater neutrino telescope's acoustic positioning system, enabling precise sensor location in deep-sea conditions.
Contribution
It introduces a specialized sound emission board optimized for the KM3NeT project, addressing cost, reliability, power efficiency, and acoustic performance requirements.
Findings
Designed a reliable, low-power emission board compatible with FFR SX30 transducers.
Achieved high acoustic emission power suitable for short signals.
Ensured low intrinsic noise and flexibility in signal emission.
Abstract
We describe the sound emission board proposed for installation in the acoustic positioning system of the future KM3NeT underwater neutrino telescope. The KM3NeT European consortium aims to build a multi-cubic kilometre underwater neutrino telescope in the deep Mediterranean Sea. In this kind of telescope the mechanical structures holding the optical sensors, which detect the Cherenkov radiation produced by muons emanating from neutrino interactions, are not completely rigid and can move up to dozens of meters in undersea currents. Knowledge of the position of the optical sensors to an accuracy of about 10 cm is needed for adequate muon track reconstruction. A positioning system based on the acoustic triangulation of sound transit time differences between fixed seabed emitters and receiving hydrophones attached to the kilometre-scale vertical flexible structures carrying the optical…
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