Design of Honeycomb Microperforated Structure with Adjustable Sound Absorption Performance

Table 3

Parameters of the back cavities.

Example
Example 1	15 mm	45 mm
Example 2	20 mm	40 mm
Example 3	25 mm	35 mm
Example 4	30 mm	30 mm
Example 5	35 mm	25 mm
Example 6	40 mm	20 mm
Example 7	45 mm	15 mm