The IEC 61000-4-21 and IEEE 299.1 documents report similar but not equal procedures to measure the shielding effectiveness (SE) of enclosures through use reverberation chambers. In this article, it is shown that these two measurement can be merged in a single, enhanced, one. particular, evaluation SE enclosure Annex H 61000-4-21, which exploits only mechanical stirring, improved by using hybrid...