Determination of sound levels 声音水平测定 ; 声音水平的测定
Substantially lower sound levels 低噪音
difference of sound levels 声级差
sound power levels 声功率级
G Sound Pressure Levels 声压水平测试
They found that at the lower speed sound levels regularly exceeded 88db, the equivalent of a diesel train passing or a construction site.
他们发现汽车低速行驶的时候，噪音水平通常超过88分贝，这个数值与柴油机车经过时或是建筑工地的噪音水平相当。
They also measured word recognition at different sound levels with male and female voices.
同时他们还对被访者测试了在不同声音强度下对男声和女声的言语识别率。
Results The equivalent sound levels (LAeq) were qualified in spite of higher background value of noise in this areas.
结果该区域背景噪声值较高，但其等效声级达标。
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