Shielding Effectiveness (SE): Definition and Decibel Conversion
Shielding effectiveness SE = 20lg(E1/E2), in dB, shows how much a shield or absorber weakens a field. Tabulates 20 to …
Shore Hardness Testing: Principle, ASTM D2240 and Shore A/D
Shore hardness is read from how deep a steel indenter presses into rubber or plastic; a deeper dent means softer …
Silicon, Silica and Silicone: Telling the Three Terms Apart
Silicon, silica (silicates) and silicone are often confused. Covers silicon in the crust, quartz versus feldspar, what …
Tear Strength Testing: DIN ISO 34-1 and the Trouser Test Piece
Tear strength, tearing force divided by thickness (kN/m), is a key rubber property. Covers the three DIN ISO 34-1 test …
Total Shielding Effectiveness of a Shield: SE = R + A + B
A wave crossing a shield loses energy by reflection (R) and absorption (A), with a correction (B): SE = R + A + B. …