Noise Testing

NTS performs a wide variety of testing in the defense industry designed to evaluate equipment and materials when subjected to various types of noise/sound.

Structure borne

Undesired vibration in (or of) solid bodies such as machinery, foundations, ship structure, or cavitations caused by variation in fluid pressure are classified as structure borne noise. Noise that interferes with peoples' ability to perform their functions properly, especially when such tasks are in a critical environment, such as a naval ship during conflict, must be mitigated. The testing process can identify and eliminate such structure borne noise.

Airborne

When structure borne noise is coupled to a surface capable of radiating this noise into the atmosphere, the noise becomes what test standards describe as airborne noise. From shipboard structures and jet engines to concert halls and subway stations, noise measurement and abatement is a huge part of testing, design, and retrofit segments of the industry.

Self-generated

Noise created by rotor tips (either in turbofan engines or in helicopters) is deemed self-generated as it stems from the rotor's leading edge shocks, rotor-wake/stator interaction, tip-clearance vortex stator interaction, and tip-leakage induced noise, among others.

Testing and noise control consulting

NTS operates noise testing facilities capable of noise assessment per MIL-STD-740, ANSI standard NEBS requirements, and a compliment of other standards. All of our noise-measuring equipment is calibrated per the relevant standards and we have facilities equipped with very small, as well as very large, noise generators.

In addition to performing noise testing for all grades and types of equipment, NTS will also help you look for possible solutions and ways to reduce your broadband and narrowband noise problems, be it with suggesting the right density of damping isolators for machinery, expansion chambers to ameliorate low frequency noise, smooth pressure transition piping to prevent cavitations, interference mufflers tuned to self-cancel each other's noise, or the use of empty spaces as absorbers of sound in noise buildings and structures.

Contact NTS today for more information on how to get your product tested!

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