自由场法测量声功率Word文件下载.docx

自由场法测量声功率Word文件下载.docx

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测点号

x/r

y/r

z/r

1

2

3

4

5

6

7

8

9

10

-0.99

0.50

–0.45

0.89

0.33

–0.66

-0.86

0.86

0.77

–0.77

0.57

-0.57

0.15

0.45

0.75

4.实验步骤

将HS自由场传声器装加在HS6288B声级计的延长电缆上并进行校准，在消声室地面中央处画圆确定测量表面的位置，将电钻置于圆心，将传声器夹在支架上，调整支架延伸杆的长度及角度，按图1确定测点位置依次测量各点声压级，按上式计算被测电钻的声功率级。

五、实验结果

1.每个测点的原始记录数据：

半球半径r=0.8m

测点1的记录数据

序号

频率（Hz）

声压级（dB）

6.3000000000e+001

4.26850e+001

8.0000000000e+001

3.91176e+001

1.0000000000e+002

4.49067e+001

1.2500000000e+002

4.87235e+001

1.6000000000e+002

5.65264e+001

2.0000000000e+002

6.03713e+001

2.5000000000e+002

5.54823e+001

3.1500000000e+002

6.13301e+001

4.0000000000e+002

6.27448e+001

5.0000000000e+002

5.83394e+001

11

6.3000000000e+002

5.23349e+001

12

8.0000000000e+002

5.74655e+001

13

1.0000000000e+003

6.23429e+001

14

1.2500000000e+003

5.09674e+001

15

1.6000000000e+003

5.11164e+001

16

2.0000000000e+003

5.50970e+001

17

2.5000000000e+003

5.07698e+001

18

3.1500000000e+003

4.81345e+001

19

4.0000000000e+003

5.05024e+001

20

5.0000000000e+003

4.33621e+001

21

6.3000000000e+003

3.89355e+001

22

8.0000000000e+003

3.92586e+001

23

1.0000000000e+004

3.95506e+001

24

1.2500000000e+004

3.59386e+001

测点2的记录数据

2.85848e+001

3.07662e+001

3.49995e+001

3.67705e+001

4.44302e+001

4.86575e+001

4.85217e+001

6.02939e+001

5.87627e+001

6.10334e+001

6.16746e+001

5.91776e+001

6.38973e+001

6.22307e+001

6.61915e+001

6.68039e+001

7.65683e+001

7.62447e+001

7.22631e+001

6.83699e+001

6.55720e+001

6.60565e+001

6.48718e+001

6.30553e+001

测点3的记录数据

2.86541e+001

3.17247e+001

4.22254e+001

3.91409e+001

4.55951e+001

4.82254e+001

4.99764e+001

5.81686e+001

5.70080e+001

5.97292e+001

6.09798e+001

6.41925e+001

6.98105e+001

7.22627e+001

7.24525e+001

6.95435e+001

7.46119e+001

6.90675e+001

7.62461e+001

7.48683e+001

6.74903e+001

6.70415e+001

6.67820e+001

6.49849e+001

测点4的记录数据

2.41419e+001

2.85947e+001

4.05011e+001

3.30512e+001

3.69295e+001

4.30127e+001

4.66979e+001

5.76067e+001

5.59737e+001

6.05978e+001

6.31712e+001

6.71766e+001

7.04580e+001

7.16968e+001

6.91766e+001

7.38660e+001

7.05139e+001

7.12660e+001

7.52949e+001

6.99514e+001

6.90324e+001

6.77035e+001

6.56655e+001

6.44730e+001

测点5的记录数据

2.45747e+001

2.62489e+001

3.17236e+001

3.83195e+001

4.47805e+001

4.71485e+001

4.87424e+001

5.98320e+001

5.77249e+001

6.00334e+001

6.22407e+001

6.54265e+001

6.85357e+001

6.80967e+001

6.94998e+001

6.59071e+001

7.19332e+001

7.28463e+001

7.15122e+001

7.04118e+001

6.61315e+001

6.50594e+001

6.70321e+001

6.18396e+001

测点6的记录数据

2.80322e+001

3.08437e+001

3.63733e+001

3.58923e+001

4.20785e+001

4.03788e+001

4.42155e+001

4.93321e+001

5.31587e+001

5.65769e+001

5.98299e+001

6.58934e+001

7.10451e+001

7.03120e+001

6.86253e+001

7.08321e+001

6.92552e+001

6.84775e+001

7.39125e+001

7.00372e+001

6.67916e+001

6.54144e+001

6.61451e+001

6.39371e+001

测点7的记录数据

5.87263e+001

5.72207e+001

5.17067e+001

4.85478e+001

4.67473e+001

4.57892e+001

4.72410e+001

5.55667e+001

5.69116e+001

5.87219e+001

6.28192e+001

6.96265e+001

7.27475e+001

7.01544e+001

6.93641e+001

7.13205e+001

7.50484e+001

7.33248e+001

7.40256e+001

6.90320e+001

6.61139e+001

6.72157e+001

6.51052e+001

6.15588e+001

测点8的记录数据

2.79751e+001

2.91717e+001

3.74784e+001

3.70162e+001

4.25198e+001

4.26275e+001

4.58913e+001

5.66895e+001

5.57578e+001

5.86699e+001

6.35316e+001

7.03141e+001

7.40493e+001

6.95273e+001

6.67842e+001

7.21716e+001

7.64255e+001

7.49823e+001

7.39499e+001

7.01009e+001

7.08282e+001

6.72810e+001

6.49728e+001

6.54819e+001

测点9的记录数据

2.66892e+001

2.83850e+001

3.63599e+001

3.64220e+001

4.21315e+001

4.34957e+001

4.57244e+001

4.96399e+001

5.32388e+001

5.77944e+001

6.40408e+001

6.64229e+001

7.01934e+001

6.94370e+001

6.63248e+001

7.21457e+001

7.47658e+001

7.42276e+001

7.61133e+001

7.03365e+001

6.65539e+001

6.75153e+001

6.48808e+001

6.45882e+001

测点10的记录数据

2.79003e+001

2.71257e+001

3.56100e+001

3.31189e+001

3.83103e+001

4.24349e+001

4.67852e+001

5.70304e+001

5.96226e+001

6.35944e+001

6.63078e+001

6.95178e+001

6.95546e+001

6.91461e+001

6.87565e+001

7.12519e+001

7.27371e+001

6.92435e+001

7.12147e+0