Vibration source

Acceleration (m/s²)

Frequency (Hz)

Drilling machine

0.93

178

Lathe machine

1.36

68

Bearing test bed

10.57

200

Refrigerator

0.14

110

Washing machine

0.82

62

Cloth dryer

4.21

59

Microwave oven

0.49

40

A/C compressor

2.14

59

Car engine

0.56

30

Truck engine

1.98

37