TABLE 8.

Final Variable settings

Cartridge Manufacturing Variables
No. of air pockets per chamber	21
Piezo offset (distance from PZT to bottom of air pocket)	1 mm
Machine used	Roland
Material used	Polycarbonate

Cartridge Dimension Variables
Diameter of the chamber	13 mm
Depth of chamber	0.60 mm
Depth of air pockets	0.4 mm
Pitch of the air pockets (center line to center line)	2.5 mm

PZT Variables
Diameter of PZT	23.5 mm
Condition of PZT	Double – sided (new)
Attachment method of PZT to cartridge	Glue to bottom of PZT
Frequency Range	1.25 KHz
Sweep Rate	Any value between 5.73 and 9.27 seconds