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A声级(A sound level)是指用声级计的A计权网络测得的声级,单位为分贝,记作dB(A)。A声级用来模拟人耳对55dB以下低强度噪声的频率特性,它能够较好地反映人对噪声的主观评价。A
A sound level is the sound level measured by the A-weighted network of the sound level meter in decibels and is reported as dB (A). A sound level is used to simulate the human ear on the low-intensity noise below 55dB frequency characteristics, it can better reflect the subjective evaluation of noise. A