Initial data for calculation options

Tasks for self-training

In a production room with permanent work spaces, measuring a×b×h m, there is equipment with an increased level of sound at the workplace. Ensure noise reduction by using sound-absorbing liners. Determine the effectiveness of the use of the selected lining material by comparison with the permissible levels of sound pressure (see Table 4.1). The data for calculating are given in table 4.7 and 4.8.

 

Table 4.7

Initial data for calculation options

№

option

 Room size

Sound pressure level at the workplace

1,3,5

4×12×6

2,4,6

3×10×6

7,9,11

10×12×4

8,10,12

4×10×6

13,15

6×14×8

14,16

4×18×6

 

Table 4.8

Initial data for calculation options  (continuation)

№ option

S_d, м²

Sound absorption material

1, 16

The mats made of fiberglass thickness  of 50 mm  

2, 17

Perforated panel size of 25 × 25 cm and 3 cm thick with asbestos wool thickness  6 mm inside

3, 18

Foam rubber

4, 19

Perlite plate thickness of 30 mm

5, 20

Isolative plate thickness 50 mm, length 30 mm

6, 21

The mats made of fiberglass thickness of 50 mm  

7, 22

Perforated panel size of 25 × 25 cm and 3 cm thick with asbestos wool thickness  6 mm inside

8, 23

Foam rubber

9, 24

Perlite plate thickness of 30 mm

10, 25

Isolative plate thickness 50 mm, length 30 mm

11, 26

The mats made of fiberglass thickness of 50 mm

12, 27

Perforated panel size of 25 × 25 cm and 3 cm thick with asbestos wool thickness  6 mm inside

13, 28

Foam rubber

14, 29

Perlite plate thickness of 30 mm

15, 30

Isolative plate thickness 50 mm, length 30 mm