Particle Impact Noise Detection (PIND)
Particle Impact Noise Detection testing, known as PIND or PIN-D, is performed to detect loose particles inside a device cavity. The PIND test provides a nondestructive means of identifying those devices containing sufficient mass that, upon impact with the case, excite the transducer.
The equipment required for PIND testing includes a threshold detector, a variable shaker and driver assembly to provide a sinusoidal motion to the DUT (device under test), a transducer and a shock mechanism capable of imparting shock pulses to the DUT.
Test Specifications / Standards
MIL-STD-883, Method 2020 MIL-STD-202, Method 217A