The cutting of wood is proceeded at high feed speed of material and high cutting speed of the circular saw blades. The cicular saw blades teeth rotate in outer ambient and thus are source of noise with unadvisable effects on working environment. The paper presents the results of the measurement of the noise level of three structuraly different circular saw blades. The types of the circular saw blades are: without slots, with six compensating slots in radial direction and with six compensating slots in tangential direction and with compensating slots in conjunction with RAL 9006 paint. The diameters of the circular saw blades were 350 mm. The measurements of the noise level were performed when cutting boards of thickness h = 25 mm (Picea excelsa L.) using the standard equipments. The clamping flanges used had an outside diameter Ø d_p = 110 mm. Feed speeds of cut material were v_f1 = 12 m/min and v_f2 = 17 m/min. The speed of the circular saw shaft for experimental noise level measurements was n₁ = 4050 rpm; n₂ = 4075 rpm and n₃ = 4100 rpm. The different modification of the circular saw blades body when idling only occurred in low differences in equivalent sound pressure levels LA_eq ≈ 1 dB. The circular saw blades with compensating slots emit a higher noise level than the corresponding hygiene regulations, but their noise level was of (4 ÷ 6) dB lower than the circular saw blade noise level without slots. The noise level of the circular saw blade with compensating slots in conjunction with RAL 9006 paint was the lowest. Decreasing the value of logarithmic decrement δ of the circular saw blade causes the decreasing the value of the equivalent sound pressure level LA_eq of the circular saw at the same design during idling.

木材的切割是在材料的高进给速度和圆锯片的高切割速度下进行的。圆锯片的齿在外部环境中旋转，因此是噪声源，对工作环境产生不可取的影响。本文介绍了三种结构不同的圆锯片噪声水平的测量结果。圆锯片的类型为：不带槽，在径向方向上具有六个补偿槽，在切线方向上具有六个补偿槽，并且与RAL 9006涂料一起具有补偿槽。圆锯片的直径为350mm。当厚度为h  = 25 mm的切菜板（Picea excelsa L。）使用标准设备。所用的夹紧凸缘具有的外径Ø d _p  = 110毫米。切割材料的进给速度为v _f1  = 12 m / min和v _f2  = 17 m / min。用于测量噪声水平的圆锯轴的速度为n ₁  = 4050 rpm；n ₂  = 4075 rpm和n ₃  = 4100 rpm。当空转时，圆锯片主体的不同修改仅发生在等效声压级LA _eq的较小差异中≈1分贝。带有补偿槽的圆锯片发出的噪音水平要高于相应的卫生法规，但其噪音水平比没有槽的圆锯片的噪音水平低（4÷6）dB。带有补偿槽的圆锯片和RAL 9006涂料的噪音水平最低。减小圆锯片的对数减量δ的值会导致减小在空转期间相同设计下的圆锯的等效声压级LA _eq的值。