It doesn't matter. If the headset represents potential for failure of your product(s), it should be consider in the
DFMEA for your product. Remember--FMEA is a
process, not a document. The document is a
record of the process. The idea is to consider all of the ways that the design or process might fail (or how components might contribute to failure. Implementation of receiving verification is one possible safeguard to consider. Even if you consider and reject the idea, there should still be a record of the fact that it
was considered.