Acoustic panel with different cell configurations

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.

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.