The complaint device was returned for evaluation.Incoming visual inspection found that the case was cracked and the membrane was torn.Technical visual inspection found that the cable was in good condition and was working properly.The device had a broken diaphragm/membrane on the bottom case.The bottom case cover was replaced.Gain measurement was performed.Parameter, cable, membrane, shake/rattle, and voltage/gain tests were performed and passed.It was determined that this was related to the previous repair and the root cause was determined to be a defective case with a peeled membrane/diaphragm.This type of event will continue to be monitored.Brand name - correction.
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