Huʻa keleawehe mea kū hoʻokahi me kahi ʻano porous nui a pili. ʻO ke ʻano o ka pahu keleawe he mau pou paʻa a me kahi pūnaewele o nā cell open, e hāʻawi iā ia i nā waiwai kūʻokoʻa a me nā noi.

ʻO nā pou paʻa i loko o ka pahu keleawe i hana ʻia i ke keleawe maʻemaʻe, e hāʻawi ana i ka ikaika a me ka conductivity i ka mea. Hoʻokumu nā pou i kahi pūnaewele ʻekolu-dimensional e hāʻawi ana i ka pahu keleawe i kona kūpaʻa ʻana a hiki iā ia ke kū i nā wela kiʻekiʻe a me ke kaomi. Hāʻawi pū nā struts i kahi hoʻolālā no ka mea e mālama ai i kona ʻano a me kona ʻano, e kūpono ia no nā ʻano ʻenehana a me nā noi ʻoihana.

Ma waho aʻe o nā kia paʻa, loaʻa pū ka ʻūhā keleawe i nā pūnaewele hāmama i hoʻohele ʻia a puni ka mea. Hāʻawi kēia mau keena hāmama i ka porosity kiʻekiʻe a me ka haʻahaʻa haʻahaʻa i ka pahu keleawe, e maʻalahi a paʻa loa i nā kinoea a me nā wai. Hoʻonui pū nā pūnaewele wehe i ka wela a me kahoʻokaʻawale leo, e hana ana i ka huʻa keleawe i kūpono no nā ʻano hana wela a me ka acoustic.

ʻO ke ʻano hui pū o ka pahu keleawe, me kona mau pou ikaika a me nā pores hāmama, hāʻawi i ka mea me kahi ākea ākea nui, e hoʻomaʻamaʻa i nā kaʻina catalytic a me ka kānana. ʻO ka ʻāpana kiʻekiʻe o ka ʻili o ke keleawe a me ka ratio leo e hoʻonui ai i ka pilina ma waena o ka mea a me kona puni, e lilo ia i mea hoʻoikaika maikaʻi no nā hopena kemika a me kahi.kānana kūponono ka hoʻokaʻawale ʻana i nā ʻāpana mai nā wai.

ʻO ka holoʻokoʻa, ke ʻano ohuʻa keleawelilo ia i mea waiwai a waiwai no nā ʻoihana like ʻole. ʻO kāna hui like ʻole o nā pou paʻa a me nā pores hāmama e hāʻawi iā ia i ka ikaika kiʻekiʻe, conductivity, permeability a me ka ʻili o ka ʻili, e kūpono ia no nā noi e like me nā mea hoʻololi wela, nā mea hoʻololi catalytic, nā kānana a menā panela acoustic. Me nā holomua hou i ka hana ʻana i ka copper foam, e hoʻomau ka hana i ka hana koʻikoʻi i ka wehe ʻana i kona hiki piha no nā noi e hiki mai ana.