Overview

In this section, some comparisons of ZORBA's predictions and measurements are presented. The measurements have been performed in Sweden and in the Laboratory of Acoustics of Auckland University, in New Zealand.

The examples of validations of the model are here gathered by type of Facing:
Example1-3: Perforated Facing.
Example 4-6: Slotted Panel.
Example 7-9: Slats.

Example 3 - Perforated Facing

Porous Layer:
Width: 50mm
Flow Resistivity: 7000 Rayls/m
Facing:
Width: 17mm
Perforation Diameter: 4.8mm
Perforation Pitch: 13.5mm
Open Area: 9.9%

Example 1 - Slotted Facing

Porous Layer:
Width: 25mm
Flow Resistivity: 7000 Rayls/m
Facing:
Width: 17mm
Slot width: 8mm
Slot vertical pitch: 65mm
Slot length: 250mm
Slot horizontal pitch: 25mm
Open Area: 11%

Example 7 - Slotted Facing

Porous Layer:
Width: 50mm
Flow Resistivity: 7000 Rayls/m
Facing:
Width: 17mm
Slot width: 8mm
Slot vertical pitch: 32.9mm
Slot length: 108mm
Slot horizontal pitch: 35mm
Open Area: 18%

Example 7 - Slat Facing

Porous Layer:
Width: 30mm
Flow Resistivity: 16768 Rayls/m
Facing:
Width: 13mm
Slot width: 4mm
Slat width: 70mm
Open Area: 5.4%