Sound-generating glazing
A glazing comprising a sheet of glass, a film of damping material, and a rigid sheet, the assembly being laminated and comprising one or more exciters fastened to the glazing.
1. A sound generating glazing, comprising:
a glass sheet,
a film of absorbent material, and
a rigid sheet,
wherein the glass sheet, the film, and the rigid sheet are laminated,
an exciter is fastened to the glazing,
the film comprises a layer comprising at least one material selected from the group consisting of an ethylene-vinyl acetate copolymer, a polyurethane, a polyacetal, and an epoxy resin, and
the layer has a shear modulus of less than 10 6 Pa for a frequency of 200 Hz at a temperature of 20° C.
2. The glazing of claim 1 , wherein the glazing has an absorption factor of less than 80% at 200 Hz and at 20° C.
3. The glazing of claim 2 , wherein the absorption factor is from 10 to 50%.
4. The glazing of claim 1 , wherein the glazing has an absorption averaged over a frequency range from 200 to 4400 Hz of more than 12% for temperatures from 20° to 40° C.
5. The glazing of claim 4 , wherein the glazing has an absorption averaged over the frequency range from 200 to 4400 Hz of more than 20% for temperatures from 20° to 40° C.
6. The glazing of claim 4 , wherein a variation of the absorption averaged over the frequency range as a function of temperature remains less than 35% in absolute value over a temperature range of 20° to 40° C.
7. The glazing of claim 6 , wherein the variation of the absorption averaged over the frequency range as a function of temperature remains less than 25% in absolute value over the temperature range of 20° to 40° C.
8. The glazing of claim 1 , wherein the film is a composite comprising at least two layers.
9. The glazing of claim 1 , wherein a thickness of the glass sheet is such that the glass sheet has a coincidence frequency higher than 10 kHz.
10. The glazing of claim 9 , wherein the thickness of the glass sheet is less than 2 mm.
11. The glazing of claim 10 , wherein the thickness of the glass sheet is more than 0.8 mm.
12. The glazing of claim 11 , wherein the thickness of the glass sheet is from 1 to 1.5 mm.
13. The glazing of claim 9 , wherein a thickness of the glazing is more than 2 mm.
14. The glazing of claim 13 , wherein the thickness of the glazing is from 2.5 to 5 mm.
15. The glazing of claim 14 ,
wherein the thickness of the glass sheet is from 1 to 1.5 mm,
a thickness of the film is from 0.3 to 1 mm, and
a thickness of the rigid sheet is from 1 to 1.5 mm.
16. An image display screen coated with a phonic glazing,
wherein the phonic glazing is the glazing of claim 1 .
17. The screen of claim 16 ,
wherein the screen is suitable for installation in an image generator, and
the image generator is a physical analyzer, a chemical analyzer, a television, a computer, or a mobile phone.