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MIL-STD 883 Vibration Noise

The purpose MIL-STD-883 vibration noise testing is to measure the amount of electrical noise produced by a device under vibration. This is tested by fastening the test device to a shaker machine to evaluate the amount of electrical noise produced. This acoustic testing ought to be performed in a vibration noise testing lab with the appropriate test equipment.

Keystone Compliance is a vibration noise lab with significant experience in MIL-STD-883 vibration noise testing. Our test engineers have an in-depth knowledge of MIL-STD 883 acoustic testing for commercial, military, and aerospace products. This includes MIL-STD 883G acoustic and MIL-STD 883H acoustic.

The following information is extremely technical in nature. It provides a summary of Method 2001.6, as derived from the MIL-883 vibration noise section. Even though the language is from MIL-883K, it applies previous versions of the standard. This includes MIL-STD 883G vibration noise and MIL-STD 883H vibration noise.

What is the Procedure for Method 2006.1 Vibration Noise?

The test device and its leads must be rigidly fastened on the vibration platform and the leads or cables adequately secured. The device is vibrated with simple harmonic motion. This motion has either an amplitude of 0.06 inch double amplitude or a constant peak acceleration of 20 g minimum. The vibration frequency shall be varied between 20 and 2,000 Hz.

For each cycle, the entire frequency range should be traversed in no less than 4 minutes per cycle. Each cycle is performed once in each of the orientations X, Y, and Z. It is performed a total of 3 times, so that the motion is applied for a total period of about 12 minutes.

What Are the Correct Voltages and Currents to Achieve the Best Vibration Noise Testing?

Specified voltages and currents according to MIL-STD-883 acoustic must be applied in the test circuit. The maximum noise-output voltage refers to that which occurs from across the specified load resistance during traverse. It is measured with an average-responding root-mean-square (rms) calibrated high impedance voltmeter.

The meter shall measure the rms value of a sine-wave voltage at 2,000 Hz, with an error of not more than 3 percent. The characteristic of the meter over a bandwidth of 20 to 2,000 Hz shall be ±1 decibel (dB) of the value at 2,000 Hz. This includes an attenuation rate below 20 and above 20,000 Hz of 6 ±2 dB per octave.

The maximum inherent noise in the circuit shall be at least 10 dB below the specified noise-output voltage. When specified, devices with an internal cavity containing elements subject to possible movement or breakage must be further examined. This is done by radiographic examination or by deluding. It may also be done by opening and internal visual examination at 30X magnification to reveal damage or dislocation.

This test may be performed as part of a group or subgroup of tests. In this case, the post-test measurements or inspections need not be performed specifically at the conclusion of this test. They may be performed once at the conclusion of the group or subgroup of MIL-883 acoustic tests.

How is the Examination Performed Once Vibration Noise Testing is Complete?

After completion of the test, an external visual examination of the marking must be performed. This is done without magnification. It may also be done with a magnification no greater than 3X.

A visual examination of the case, leads, or seals shall be performed at a magnification between 10X and 20X. This examination and any additional specified measurements and examination shall be made after completion of the final cycle. They may also be completed upon completion of a group, sequence, or subgroup of tests.

Where is the Best Vibration Noise Lab to Get the Vibration Noise Certification for Your Product?

Keystone Compliance has been recognized as one of the best variable noise vibration laboratories in the country. We are knowledgeable in all MIL-883G vibrations noise and MIL-883H Vibration Noise testing standards. Our vibration noise laboratory and test engineers understand the nuances of the vibration profiles and vibe testing.

Looking to get vibration noise compliance testing for your product? Talk to our experts to develop a streamlined test plan and receive a professional and affordable quote. Work with certified vibration analysts that understand the requirements of MIL-883G acoustic and MIL-883H acoustic testing. Contact us to learn why so many manufacturers rely on Keystone Compliance to meet their vibration testing needs.

MIL-STD-883 testing contains several test methods. For more information about these test methods, please click on one of the links below.