The Low-Noise Hydrophone is a high-performance underwater acoustic sensor developed by EchoingOcean for underwater acoustic measurement, environmental noise assessment, biological sound observation, soundscape recording, and marine acoustic research. Featuring a compact and lightweight cylindrical design, it measures approximately 35 mm in diameter and 240 mm in length, with a total weight of about 0.7 kg. The hydrophone can be easily integrated with underwater vehicles, acoustic arrays, data acquisition devices, or long-term monitoring systems.

With a frequency range of approximately 20 Hz–250 kHz and a receiving sensitivity of approximately -170 dB re 1 V/Pa, it provides stable and clear underwater sound reception. Its housing is designed to withstand hydrostatic pressure equivalent to a water depth of 1,800 m, making it suitable for nearshore, offshore, and deep-water acoustic data collection and monitoring applications.