Silencers
Selecting a proper silencer typically begins with completing a calculation from V-A Design’s analysis view. When a calculation path has been completed, the header will provide feedback to the user whether the target background noise level is being achieved.
Calculation header with required insertion loss and end result.
To make a silencer selection, begin by selecting a position along the duct path where you’d like to position the silencer. The Vibro-Acoustics silencer configurator will become active, and you can click the text to begin configuring the product.
Silencer configurator enabled with path element selection.
There are 4 areas of the silencer selection tool that will help you optimize product selections for your project.
- Left Margin. Silencer dimensional attributes, construction attributes.
- Required Insertion Loss. Calculated insertion loss and safety factor adjustments.
- Silencer Results. List of silencers with performance data and predicted end result.
- Additional Resources. Silencer data sheets and product information.
Silencer configurator.
Left Margin
Tag. Name attached to the product selection, which will appear in schedule and calculation summary reports.
System. Path Name associated with your calculation. This also appears on schedule reports, for reference.
Dimensional and Aerodynamic constraints
Shape (e.g., Rectangular, Circular)
Width
Height
Length
Diameter
Extended Width
Airflow
Velocity
Maximum Pressure Drop
Side of Fan (e.g., Discharge, Return)
System Effects. Designate the inlet and outlet conditions of the silencer, which calculates the silencer pressure drop with system effects. Since silencer pressure drop is measured in a laboratory setting under ideal flow conditions, these system effects should be considered to approximate the pressure drop of installation conditions. The laboratory tested pressure drop, and the pressure drop with system effects, are shown in the results section.
Product Configuration. Designate specific baffle configurations (Velocity Key, Module Size, etc.).
Required Insertion Loss
By default, the application filters silencer products by Calculated Insertion Loss requirements, or, the insertion loss required to meet your specified Noise Criteria. If you’d like, a Safety Factor can be applied to individual octave bands, which will increase the insertion loss requirements used to filter the results.
If you’d prefer to use alternative criteria to filter results, just click the Override Required Insertion Loss checkbox and use your own values.
Silencer configurator Required Insertion Loss and Safety Factor adjustment.
Silencer Results
Silencer results are displayed in a grid, rank ordered by acoustic performance, length, and pressure drop. With all the filters set, evaluate the products listed, select a silencer, and click Create in the lower righthand corner of the view. The silencer will be added to your path, and the calculation is updated to reflect the reduced noise level.
Silencer results.