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1. WO2007102056 - ÉPONGE ACOUSTIQUE POUR HAUTS-PARLEURS

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

What is claimed is:

1. A loudspeaker, comprising:
a diaphragm configured to provide an acoustic signal by a way of vibrations from said loudspeaker in forward and backward directions; and
a sound sponge block comprising multiple ducts made of a pre-selected material placed behind said diaphragm without physically touching said diaphragm, wherein said multiple ducts have predetermined geometrical dimensions to substantially absorb the sound waves radiated from a rear side of said diaphragm in said backward direction.

2. The loudspeaker of claim 1 , wherein said multiple ducts are round cylinders.

3. The loudspeaker of claim 2, wherein said round cylinders have a diameter between 0.1 and 10 microns.

4. The loudspeaker of claim 1 , wherein ends of said multiple ducts furthest from the diaphragm are sealed and have an infinite specific termination impedance.

5. The loudspeaker of claim 1, wherein said multiple ducts are parallel to each other.

6. The loudspeaker of claim 1, wherein said multiple ducts are substantially perpendicular to a surface of said diaphragm.

7. The loudspeaker of claim 1 , wherein a cross section of said multiple ducts comprise 90% or less of a total cross section area of said sound sponge block.

8. The loudspeaker of claim 1 , wherein a sound sponge block has a real part of an acoustic impedance substantially constant in a predetermined frequency range.

9. The loudspeaker of claim 8, wherein said frequency range is from 10 Hz to 10,000 Hz.

10. An electronic device, comprising:
a signal provider, configured to provide an electric drive signal; and
a loudspeaker, responsive to said electric drive signal, configured to provide an acoustic signal of said electronic device in response to said electric drive signal, wherein said loudspeaker comprises:
a diaphragm configured to provide said acoustic signal by a way of vibrations from said loudspeaker in forward and backward directions; and
a sound sponge block comprising multiple ducts made of a pre-selected material placed behind said diaphragm without physically touching said
diaphragm, wherein said multiple ducts have predetermined geometrical
dimensions to substantially absorb the sound waves radiated from a rear side of said diaphragm in said backward direction.

11. The electronic device of claim 10, wherein said diaphragm is made of optically transparent material such that said loudspeaker is combined with a display of said electronic device.

12. A method, comprising:
providing an acoustic signal in forward and backward directions by a way of vibrations of a diaphragm of a loudspeaker; and
absorbing the sound waves radiated from a rear side of said diaphragm in a backward direction using a sound sponge block comprising multiple ducts made of a pre-selected material placed behind said diaphragm without physically touching said diaphragm, wherein said multiple ducts have predetermined geometrical dimensions to substantially absorb said sound waves.

13. The method of claim 12, wherein said multiple ducts are round cylinders.

14. The method of claim 13, wherein said round cylinders have a diameter between 0.1 and 10 microns.

15. The method of claim 12, wherein ends of said multiple ducts furthest from the diaphragm are sealed and have an infinite specific termination impedance.

16. The method of claim 12, wherein said multiple ducts are parallel to each other.

17. The method of claim 12, wherein said multiple ducts are substantially perpendicular to a surface of said diaphragm.

18. The method of claim 12, wherein a cross section of said multiple ducts comprise 90% or less of a total cross section area of said sound sponge block.

19. The method of claim 12, wherein a sound sponge block has a real part of an acoustic impedance substantially constant in a predetermined frequency range.

20. The method of claim 19, wherein said frequency range is from 10 Hz to 10,000 Hz.

21. The method of claim 12, wherein said electronic device is a communication device, a computer, a wireless communication device, a portable electronic device, a mobile electronic device or a mobile phone.

22. A loudspeaker, comprising:
means for providing an acoustic signal by a way of vibrations from said loudspeaker in forward and backward directions; and
means for absorbing, comprising multiple ducts made of a pre-selected material placed behind said diaphragm without physically touching said diaphragm, wherein said multiple ducts have predetermined geometrical dimensions to substantially absorb the sound waves radiated from a rear side of said diaphragm in said backward direction.

23. The loudspeaker of claim 22, wherein said means for providing the acoustic signal is a diaphragm, and said means for absorbing is a sound sponge block.