Nkembelata mkpọtụọnụọgụgụ (nke a na-akpọkarị NRC) bụ otu ọnụọgụgụ nke 0.0-1.0, nke na-akọwa nkezi arụmọrụ nnabata ụda nke ihe ahụ.Nkembelata mkpọtụọnụọgụgụ bụ nkezi nke ọnụọgụ nnabata ụda Sabine tụrụ na 250, 500, 1000, na 2000 Hz.

Uru nke 0.0 pụtara na ihe ahụ anaghị ebelata ụda etiti etiti, kama na-egosipụta ike ụda.Nke a bụ ihe echiche karịa n'ụzọ anụ ahụ: ọbụna nnukwu ihe mgbidi ga-ebelata ụda, nambelata mkpọtụọnụọgụ nwere ike ịbụ 0.05.

N'ụzọ megidere nke ahụ, ọnụọgụ mbelata mkpọtụ nke 1.0 pụtara na mpaghara ụda olu (na sabin dị ka unit) nke ihe a na-enye hà nhata n'akụkụ elu ya nwere akụkụ abụọ.Ọkwa a bụ ihe a na-ejikarị eme ihe maka ihe na-adọta ụda dị arọ (dị ka panel fiberglass nke nwere nnukwu anụ ọhịa 2-inch).Ihe a nwere ike nweta uru nbelata mkpọtụ mkpọtụ karịrị 1.00.Nke a bụ ntụpọ na usoro ule, ọ bụkwa njedebe nke nkọwa onye na-anụ ọkụ n'obi nke otu square karịa njirimara nke ihe ahụ n'onwe ya.

A na-ejikarị ihe na-ebelata mkpọtụ iji nyochaa arụmọrụ ụda olu nke elu ụlọ, nkebi, ọkọlọtọ, enyo ụlọ ọrụ, na akụkụ mgbidi ụda olu.Mgbe ụfọdụ, a na-eji nyochaa mkpuchi nke ala.Agbanyeghị,mbelata mkpọtụbụ naanịmbelata mkpọtụ, nke nwere ike ibelata mmetụta mkpọtụ na-emetụta ndị mmadụ n'ụzọ dị irè, mana ọ nweghị ike imechi ụda ahụ kpamkpam.Ọ ka dị mkpa ịchọta ihe ndị ọkachamara na-emepụta ụda.

Yabụ kedu ihe NRC dị elu na-anata ụda?Mineral eriri uko ụlọ osisi na fiberglass osisi bụ mma ihe maka ụda absorption nambelata mkpọtụ.The nrc nke mineral fiberboard bụ n'ozuzu banyere 0.5, na nrc nke fiberglass osisi nwere ike iru 0.9-1.0.Anyị nwere ike ịwụnye ihe ndị dị n'uko ụlọ kwesịrị ekwesị dabere na gburugburu ebe dị iche iche.