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声响是任何弹性物体(气体、液体或固体)机械振动的结果,能量通过波的运动经弹性物体从声源往外传递。噪声量测噪声计的现行标准规定4个等级;0级——科学实验室级;1级——相当于原来的精密级;2级——相当于原来的工业级;3级。
Sound is the result of mechanical vibrations of any elastic body (gas, liquid or solid) through which the energy is transmitted from the sound source through the elastic body. The current standard of noise measurement noise meter provides four levels; 0 level - scientific laboratory level; 1 level - equivalent to the original precision level; Level 2 - equivalent to the original industrial grade;