Abstract: The index of noise is dB(A) in the national standard for laboratory animal facility and environment of P. R. China GB14925-2010 and in relative standards of many foreign countries. This index is based on the character of human being hearing. The limitation value of the noise in standard of P. R. China is ≤60 dB(A). That is also from the demand of human being hearing. But many natural evidences and scientific researches show that the index and limitation value is not reasonable nor scientific. The writers discussed such argument based on available scientific documents. And the writers proposed that NOEV[dB(C)], No observed Effect Volume [dB(C)], could be the suitable index and limitation value for noise in laboratory animal facility and environment based on available scientific documents, and derived that NOEV[dB(C)] is different between different laboratory animals. The detailed data could be obtained by new scientific researches. The revivew pointed out the direction for how to get the limitation value of noise in laboratory animal facility and environment.

Key words: Laboratory Animal Facility, Limitation Value of Noise, No Observed Effect Volume(NOEV), dB(C)