A Measurement and Analysis of Low Level Radiated-Noise Using Vertical Line Array

Choi, Jae-Yong; Son, Kweon; Dho, Kyeong-Cheol

Journal of the Korea Institute of Military Science and Technology 2003;6(2):55-64.

Jae-Yong Choi, Kweon Son, Kyeong-Cheol Dho

수직선배열을 이용한 저소음 함정음향 측정 및 분석기법

최재용, 손권, 도경철

국방과학연구소

Abstract

Underwater acoustic noise measurement is an essential element for vulnerability assessment of modern naval platforms. But during the last few decades environmental conditions have drastically changed due to the gradually increasing sea ambient noise level and decreasing submarine radiated noise level. A real-time underwater acoustic measurement system with vertical line array is designed for the quiet submarine radiated noise assessment in challenging environment. This system has a constant directivity index in measurement frequency range and accurate tracking capability for the transmission loss compensation and navigation aids inside the submarine. This system has been validated at sea and used several times for the submarine noise measurement.

Key Words: Underwater Acoustic Measurement, Focused Beam, Vortical Line Array, Directivity Index