| 摘要 |
A glazing panel consists of or includes a pane 10 comprising a pair of vitreous sheets 1, 2 adherent to an intervening layer of polymeric material 3. The intervening layer of polymeric material has viscoelastic properties such tha t the critical frequency of coincidence (or the lower or lowest critical frequency of coincidence if there is more than one) of the pane 10 ["the coincidence frequency (~p) of the pane"] is greater than the critical frequency of coincidence of a notional monolithic vitreous sheet ["the coincidence frequency (~m) of the equivalent monolith"] which monolithic sheet is of the same shape and area a s the pane and has a mass equal to the total mass of vitreous material in the pane , and the panel is associated with means such as a radiation absorbing coating 4 and/or a low emissivity coating 5 capable of influencing the temperature of the intervening layer 3 of polymeric material. Alternatively or in addition, the panel may be associated with, or incorporate, an electrical resistance or convecti on heater.
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