SE(dB)=20⋅log10(VrefVchamber)cap S cap E open paren d cap B close paren equals 20 center dot log base 10 of open paren the fraction with numerator cap V sub r e f end-sub and denominator cap V sub c h a m b e r end-sub end-fraction close paren
The standard is a European technical specification focused on Anechoic Chambers , specifically regarding the measurement of shielding effectiveness .
Modern electronic devices must pass strict EMC testing before entering the market. If an anechoic chamber leaks, outside signals like cellular networks, Wi-Fi, or radio broadcasts will corrupt the test data. EN 50147-1 guarantees the room is completely sealed against this outside interference. The Scope of the Standard en 50147-1 pdf
In modern electronics, shielding is essential to prevent devices from interfering with one another. This standard is widely used by:
Enclosures designed to prevent external RF signals from entering. SE(dB)=20⋅log10(VrefVchamber)cap S cap E open paren d cap
: The SE is calculated as the ratio (in decibels, dB) between the reference signal and the attenuated signal. A high-quality chamber often requires an SE of 100 dB or more . Importance in Industry
Emission measurements in fully anechoic chambers. Key Content of the Standard EN 50147-1 guarantees the room is completely sealed
It ensures that measurements taken by different engineers or companies are comparable.