Figure 2

(a) Geometrical parameters of double glazing windows. T is nominally either 4 mm or 6 mm and G is usually 16 mm. (b) Transmission coefficient of the waves impinged on double glazing windows with different angles for two types of glasses with \(T= 4 \,\mathrm{{mm}}\) and \(T = 6\,\mathrm{{mm}}\) while the G is 16 mm. All results are related to TE mode where \(\phi \) is zero (Fig. 1a).