High sound attenuation building panels

An acoustic ceiling panel comprising:

• a first air-permeable body comprising a first major surface opposite a second major surface and a side surface extending between the first and second major surfaces of the first body, the first major surface comprises a first plurality of openings, the second major surface comprising a second plurality of openings, and the side surface comprising a third plurality of openings, and the first air-permeable body having an NRC value of at least 0.75 as measured between the first and second major surfaces of the first air-permeable body;
• an attenuation coating applied to the second major surface of the first air-permeable body and the side surface of the first air-permeable body;
• and
• an attenuation body comprising a first major surface opposite a second major surface and a side surface extending between the first and second major surfaces of the attenuation body, the attenuation body having a CAC value of at least 40 as measured between the first and second major surfaces of the attenuation body;
• whereby the attenuation coating is positioned between the first air-permeable body and the attenuation body, and the first major surface of the attenuation body is offset from the second major surface of the first air-permeable body by the attenuation coating.

An acoustic ceiling panel having a first exposed major surface opposite a second major exposed surface and a side exposed surface extending between the first and second major exposed surface, wherein the acoustic ceiling panel comprises a multilayered body having

• a first layer formed of noise reducing air-permeable material;
• a second layer of sound attenuation material;
• and
• an attenuation coating applied between the first layer and the second layer;
• wherein the first exposed major surface comprises the noise reducing air-permeable material of the first layer, the second exposed major surface comprises the sound attenuation material of the second layer, and the exposed side surface comprises the first layer, the second layer, and the attenuation coating.