Acoustic panel with different cell configurations

1 . An acoustic panel for an aircraft, comprising:

a skin comprising a plurality of perforations;

a plurality of first cells, each of the plurality of first cells including a first tube, a first endwall and a first cavity, the first tube projecting vertically out from the skin to a distal end of the first tube, the first endwall closing off the first cavity at the distal end of the first tube, the first cavity extending vertically through the first tube from the skin to the first endwall, the first cavity fluidly coupled with a first set of one or more of the plurality of perforations, and the first cavity including a first vertical height and a first lateral width, and the first lateral width extending along an axis; and

a plurality of second cells interspersed with the plurality of first cells, each of the plurality of second cells including a second tube, a second endwall and a second cavity, the second tube projecting vertically out from the skin to a distal end of the second tube, the second endwall closing off the second cavity at the distal end of the second tube and vertically offset from the first endwall of each of the plurality of first cells, the second cavity extending vertically through the second tube from the skin to the second endwall, the second cavity fluidly coupled with a second set of one or more of the plurality of perforations, the second cavity including a second vertical height and a second lateral width, and the second lateral width extending along the axis;

wherein the second lateral width is greater than the first lateral width;

wherein the first vertical height is greater than the second vertical height; and

wherein the plurality of second cells are independent of the plurality of first cells.

2 . The acoustic panel of claim 1 , further comprising a plurality of third cells interspersed with the plurality of first cells and the plurality of second cells, each of the plurality of third cells including a third tube, a third endwall and a third cavity, the third tube projecting vertically out from the skin to a distal end of the third tube, the third endwall closing off the third cavity at the distal end of the third tube, the third endwall vertically offset from the first endwall of each of the plurality of first cells and the second endwall of each of the plurality of second cells, the third cavity extending vertically through the third tube from the skin to the third endwall, and the third cavity fluidly coupled with a third set of one or more of the plurality of perforations.

3 . The acoustic panel of claim 1 , wherein a first of the plurality of first cells is disposed laterally between and adjacent a first of the plurality of second cells and a second of the plurality of second cells.

4 . The acoustic panel of claim 1 , wherein

a first of the plurality of first cells is adjacent a first of the plurality of second cells and a second of the plurality of second cells; and

the first of the plurality of second cells is adjacent the second of the plurality of second cells.

5 . The acoustic panel of claim 4 , wherein a second of the plurality of first cells is adjacent the first of the plurality of second cells and the second of the plurality of second cells.

6 . The acoustic panel of claim 1 , further comprising a monolithic body including the plurality of first cells and the plurality of second cells.

7 . The acoustic panel of claim 6 , wherein the monolithic body further includes the skin.

8 . The acoustic panel of claim 1 , wherein the first cavity of each of the plurality of first cells has a first cross-sectional geometry;

the second cavity each of the plurality of second cells has a second cross-sectional geometry; and

the first cross-sectional geometry and the second cross-sectional geometry have a common shape.

9 . The acoustic panel of claim 1 , wherein at least one of; the first tube of each of the plurality of first cells has a straight centerline or the second tube of each of the plurality of second cells has a straight centerline.

10 . The acoustic panel of claim 1 , wherein at least one of the first tube or the second tube has a non-straight centerline.

11 . The acoustic panel of claim 1 , further comprising:

a second skin forming the first endwall of each of the plurality of first cells;

the second skin laterally overlapping and vertically spaced form each of the plurality of second cells.

12 . The acoustic panel of claim 1 , wherein

the first set of the one or more of the plurality of perforations consists of a quantity X of the plurality of perforations; and

the second set of the one or more of the plurality of perforations consists of a quantity Y of the plurality of perforations that is different than the quantity X.

13 . The acoustic panel of claim 1 , wherein a third set of one or more of the plurality of perforations is fluidly coupled with an interstitial space formed by and outside of one or more of the plurality of first cells and one or more of the plurality of second cells.

14 . The acoustic panel of claim 1 , wherein each of the plurality of second cells are circumferentially and axially spaced from each of the plurality of first cells.

15 . An acoustic panel for an aircraft, comprising:

a perforated skin extending axially along an axis;

a non-perforated skin extending axially along about the axis; and

a cellular core arranged vertically between and connected to the perforated skin and the non-perforated skin, the cellular core including:

a plurality of first cells arranged in an array, each of the plurality of first cells extending radially between the perforated skin and the non-perforated skin, each of the plurality of first cells comprising an internal first cavity extending radially through the cellular core from the perforated skin to the non-perforated skin, and the internal first cavity including a first width extending along the axis; and

a plurality of second cells arranged axially and circumferentially between neighboring first cells within the array of the plurality of first cells, each of the plurality of second cells projecting radially out from the perforated skin to a distal second cell end that is spaced radially from the non-perforated skin by an open volume, each of the plurality of second cells comprising an internal second cavity extending radially within the cellular core to the perforated skin, the internal second cavity including a second width extending along the axis, and the second width is greater than the first width.

16 . An acoustic panel for an aircraft, comprising:

a perforated skin; and

a cellular core connected to the perforated skin, the cellular core including:

a plurality of first cells arranged in an array, each of the plurality of first cells extending radially between the perforated skin and a first cell distal end, each of the plurality of first cells comprising an internal first cavity extending radially through the cellular core from the perforated skin to the first cell distal end, and the internal first cavity including a lateral first width and a first vertical height, and the lateral first width extending along an axis; and

a plurality of second cells dispersed within the array of the plurality of first cells, each of the plurality of second cells extending radially between the perforated skin and a second cell distal end, each of the plurality of second cells comprising an internal second cavity extending radially within the cellular core from the perforated skin to the second cell distal end, the internal second cavity including a lateral second width and a second vertical height, and the lateral second width extending along the axis;

wherein the first vertical height is greater than the second vertical height;

wherein the lateral second width is greater than the lateral first width; and

wherein each of the plurality of first cells is surrounded by a cluster of second cells within the array of the plurality of first cells.