Structural-Borne Noise (SBN) & Airborne Noise (ABN) Testing for Defense Equipment – MIL & ISO Standards
Introduction: In defense platforms such as submarines, ships, aircraft, and land vehicles, noise and vibration directly affect stealth, communication, and crew comfort. Excessive structural-borne or airborne noise can compromise operational effectiveness and even risk detection in naval operations. To prevent this, defense projects mandate SBN & ABN testing as per MIL-STD-740, MIL-STD-1474, ISO 10816, and ISO 3744 . This blog explains what SBN & ABN testing means, why it’s important, and how Indian defense suppliers can achieve compliance. 1️⃣ What is Structural-Borne Noise (SBN)? Noise generated by mechanical vibrations transmitted through the structure of equipment (e.g., pumps, motors, gear systems). Measured as vibration levels that propagate through structural paths. Critical in submarines and naval vessels , where vibration must be minimized for stealth. 2️⃣ What is Airborne Noise (ABN)? Noise radiated directly into the air from equipment. ...