System and method for noise suppression

1. A computer system, comprising:

a fan; and

a muffler configured to suppress noise from the fan, wherein the muffler comprises:

a plurality of acoustic absorption sheets comprising acoustic absorption material, wherein the acoustic absorption sheets each have a hole at least generally aligned with a flow area of the fan;

a first divider positioned between the plurality of acoustic absorption sheets; and

a shaft of acoustic absorption material at least generally aligned with a rotational axis of the fan and extending through the hole.

2. The system of claim 1 , comprising a second divider positioned a specified distance from the first divider, wherein the specified distance is based on a wavelength of noise produced by the fan.

3. The system of claim 1 , wherein the acoustic absorption sheets each have a plurality of holes at least generally aligned with a plurality of fans.

4. The system of claim 1 , comprising a plurality of dividers positioned between the plurality of acoustic absorption sheets.

5. The system of claim 1 , comprising a chassis coupled to the fan and the muffler.

6. The system of claim 5 , wherein the chassis comprises a plurality computer components.

7. A system, comprising:

an adjustable noise suppression apparatus configured to couple with a convection cooling system, comprising:

a silencer case;

a plurality of acoustic absorption members adjustably arrayed within the silencer case, wherein the plurality of acoustic absorption members each include at least one hole that generally aligns with a flow path of the convection cooling system;

a divider adjustably arrayed between the acoustic absorption members within the silencer case in a particular position based on a noise wavelength to deflect noise within the silencer case, wherein the divider includes a passage there through that generally aligns with the flow path of the convection cooling system; and

a shaft disposed within the at least one hole of each of the plurality of acoustic absorption members and the passage of the divider.

8. The system of claim 7 , comprising a fan having the flow path across or through an electronic device.

9. The system of claim 8 , wherein the electronic device comprises a blade server, a computer, a processor, memory, a power supply, a video device, an audio device, or a combination thereof.

10. The system of claim 7 , wherein the silencer case comprises an acoustic foam lining.

11. The system of claim 7 , wherein the plurality of acoustic absorption members includes individual acoustic absorption panels made of varying acoustic absorption materials.

12. The system of claim 7 , comprising a plurality of dividers adjustably arranged between the acoustic absorption members and spaced with respect to one another based on one or more noise wavelengths.

13. A method of suppressing noise in a computer system, comprising:

inducting air through an electronic chassis via a fan;

passing the inducted air through a hole in each of a plurality of acoustic absorption panels to suppress noise from the fan, wherein the hole in each of the plurality of acoustic absorption panels generally aligns with a flow path of the fan;

passing the inducted air through a hole in at least one divider, wherein the hole in the at least one divider generally aligns with the hole in each of the plurality of acoustic absorption panels; and

passing the inducted air around a shaft located within the hole in each of the plurality of acoustic absorption panels and the hole in the at least one divider.

14. The method of claim 13 , comprising attenuating a selected range of noise frequency in the inducted air by passing the inducted air through a hole in a first divider and a second divider, wherein the first divider is located a selected distance from the second divider, the selected distance corresponding to the selected range of noise frequency.

15. The method of claim 14 , wherein the selected distance is one quarter of a wavelength of the selected range of noise frequency.

16. The method of claim 13 , comprising passing the inducted air through at least two acoustic absorption panels of different acoustic absorption material.