Assertion: thickness | /r/CapableOf | offer about 25 db
Facets:
value: at 100 khz
type: TEMPORAL
Source sentences:
text: Aluminium foil is about 1 mil (25 μm); a thickness of 10 mils (250 μm) (ten times thicker) offers less than 1 dB of shielding at 1 kHz, about 8 dB at 10 kHz, and about 25 dB at 100 kHz.