Acoustic

Acoustic noise environment testing demonstrates what effect large airborne pressure fluctuations will have on materials and functioning devices. Detrimental effects of acoustic noise can include wire chaffing, component fatigue, cracking of printed circuit boards, intermittent operation of electrical contacts, optical misalignment, loosening of small particles, and excessive electrical noise.

Two main types of acoustic noise can create problems:

Those that penetrate or are generated within a closed chamber where the test item is located, and
Those that occur sweep over the test device such as would occur if the test item were situated on an outside of a moving vehicle or aircraft.

Diffuse Field Acoustic Noise

The diffuse field acoustic noise test simulates spacecraft payload bays, aircraft interiors, and other types of closed chamber environments. Providing comprehensive acoustic testing services, NTS operates three reverberation chambers with capacities up to 5,000 cubic feet (20 ft x 15 ft x 15 ft) and sound systems capable of generating levels of 165 dB. These large chambers meet the guidelines of various test standards, including MIL-STD 810, and allow us to keep the tested-item-to-chamber ratio to the ideal 1:10 even with large test articles.

Grazing Incidence Acoustic Noise

The typical types of test items subject to grazing incidence acoustic noise are aircraft instrumentation sensors, radar domes, or chaff missile decoy devices. However parts of structures, such as outside fuel tanks and virtually any other structural member, which have sound waves, pass over it will be tested in this category. NTS provides the right size progressive wave tubes for small to large items, accommodating test items up to 15 ft (4.5m) long, reaching overall acoustic pressure levels (OASPL) of 175 dB.

All NTS acoustic testing facilities are equipped with state-of-the-art computerized instrumentation. NTS's staff of acoustic test engineers has a well rounded background in space systems, defense, and various commercial test programs. Their experience spans not only designing and performing various acoustic testing programs but also designing, building and modifying acoustic test equipment to suit any custom requirement.

Contact NTS today to find out how to get your product tested!

5000 Cu Ft Acoustic Noise Reverberation Chamber

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