Sound Attenuators

AcouStick Sound Attenuators are in-duct silencers designed to reduce fan, equipment, and airflow noise transmitted through HVAC ductwork while maintaining the required air movement.

Rectangular splitter attenuators are constructed from galvanized steel with mineral fibre acoustic splitters enclosed behind perforated steel facing. Straight and 90° bend configurations are available, allowing the system to be adapted to conventional duct routes as well as compact plant room layouts.

These HVAC sound attenuators can be engineered according to the required acoustic performance, duct dimensions, airflow conditions, and available installation space.

Why Choose HVAC Sound Attenuators?

Effective Duct Noise Reduction

Sound attenuators reduce airborne noise generated by fans, air handling units, and airflow turbulence before it travels through the HVAC duct system.

Acoustic Mineral Fibre Splitters

The splitter elements contain mineral fibre acoustic infill behind perforated steel, allowing the acoustic material to absorb sound energy while remaining protected from the airflow.

Aerodynamic Design

Aerodynamic splitter profiles help reduce pressure loss and minimise regenerated noise caused by turbulent airflow.

Galvanized Steel Construction

The casing is manufactured from pre-galvanized steel for a durable enclosure suitable for HVAC and mechanical plant applications.

Straight & Bend Configurations

Straight splitter attenuators are available for conventional duct runs, while 90° bend configurations can be used where plant room space or duct routing is restricted.

Optional Protective Lining

Optional Melinex lining can be specified for applications such as hospitals and grease-laden environments where additional protection of the acoustic infill is required.

Project-Specific Engineering

Attenuator dimensions and configurations can be selected according to duct size, airflow, available length, required attenuation, and pressure-drop requirements.

How Do Sound Attenuators Work?

A sound attenuator is installed directly within the HVAC ductwork to interrupt the path of airborne noise.

As air and sound travel through the attenuator, sound energy reaches the mineral fibre splitters through the perforated facing. The acoustic infill absorbs part of the sound energy while the aerodynamic splitter geometry maintains an appropriate airflow path.

Fan / AHU Noise → HVAC Duct → Perforated Splitter → Mineral Fibre Absorption → Reduced Duct Noise

The final ventilation sound attenuation depends on the attenuator length, splitter thickness, airway gap, acoustic infill, airflow velocity, duct dimensions, and complete HVAC system configuration.

Acoustic Performance

Our duct sound attenuators are designed to reduce airborne noise travelling through HVAC ductwork while maintaining suitable airflow characteristics.

Actual acoustic attenuation and pressure-drop performance depend on the attenuator geometry, airflow velocity, splitter configuration, duct dimensions, and complete HVAC system. Project-specific acoustic and airflow calculations should be used for final selection.

Sound Attenuators Applications

Sound attenuators are suitable for HVAC systems where fan and airflow noise needs to be controlled before it reaches occupied or noise-sensitive areas.

• Air Handling Units

• Fan Rooms

• Plant Rooms

• Hospitals & Healthcare

• Hotels

• Offices

• Cleanrooms

• Noise-Sensitive Occupied Spaces

Technical Specifications

Configurations & Customisation

Our acoustic attenuators can be configured according to the HVAC system, available plant room space, airflow requirements, and required acoustic performance.

Straight Splitter Attenuator

The straight configuration is suitable for conventional rectangular duct runs where sufficient duct length is available for the required acoustic attenuation.

90° Bend Attenuator

The 90° bend configuration allows acoustic attenuation to be incorporated into tighter plant room layouts where a straight attenuator may not be practical.

Splitter Dimensions

Standard heights range from approximately 300 to 1500 mm inside the duct, while standard lengths range from 600 to 2400 mm in 300 mm increments.

Acoustic Infill

The standard splitter construction uses 48 kg/m³ mineral wool with a 100 mm slab, enclosed behind perforated galvanized steel.

Protective Lining

Melinex lining can be specified for applications such as hospitals and grease-laden conditions where additional protection of the acoustic infill is required.

Custom Engineering

Attenuators can be selected and configured around duct dimensions, available installation length, airflow requirements, noise levels, and required attenuation.

Sound Attenuators Price in Saudi Arabia

The cost of sound attenuators depends on several factors, including:

• Duct dimensions

• Attenuator length

• Splitter configuration

• Required acoustic attenuation

• Airflow volume and velocity

• Pressure-drop requirements

• Mineral fibre specification

• Casing material

• Optional Melinex lining

• Straight or bend configuration

• Required quantity

• Project-specific requirements

Because HVAC systems and acoustic requirements vary from project to project, AcouStick provides project-based pricing for sound attenuators in Saudi Arabia.

Send us your duct dimensions, airflow data, equipment noise levels, available installation space, drawings, quantities, or project details to receive a quotation based on your HVAC application.

Request a Project Price →

Frequently Asked Questions

What are sound attenuators?

Sound attenuators are acoustic devices installed inside HVAC ductwork to reduce airborne noise generated by fans, AHUs, and airflow before it reaches occupied spaces.

What is a duct sound attenuator?

A duct sound attenuator is an in-duct silencer that uses acoustic splitters, typically containing mineral fibre, to absorb sound travelling through a ventilation duct.

How do HVAC sound attenuators reduce noise?

Sound travelling through the duct encounters perforated acoustic splitters containing mineral fibre. The acoustic infill absorbs part of the sound energy while the splitter arrangement provides an airflow path through the attenuator.

Do sound attenuators reduce airflow?

An attenuator introduces some resistance to airflow, so pressure drop must be considered during HVAC design. Aerodynamic splitter profiles can be used to reduce pressure loss and regenerated noise.

What is the difference between a sound attenuator and a duct silencer?

In HVAC applications, the terms sound attenuator, duct attenuator, and duct silencer are commonly used for in-duct acoustic devices designed to reduce airborne ventilation noise.

What types of sound attenuators are available?

AcouStick configurations include straight splitter attenuators (RSA) and 90° bend attenuators (RSB) for applications with different duct routing and space requirements.

What is the standard mineral wool specification?

The specified splitter infill is 48 kg/m³ mineral wool with a 100 mm slab, enclosed behind 0.7 mm galvanized perforated steel.

What sizes are available?

Standard heights range from 300 to 1500 mm inside the duct, while standard lengths range from 600 to 2400 mm in 300 mm increments. Project-specific dimensions can be considered where required.

How much do sound attenuators cost in Saudi Arabia?

The price depends on duct dimensions, attenuator length, airflow, acoustic requirements, configuration, lining, quantity, and project conditions. AcouStick provides project-specific pricing based on the required HVAC specification.

Need Sound Attenuators for Your Project?

Send us your duct dimensions, airflow data, equipment noise levels, required attenuation, available installation length, HVAC drawings, or project details and our acoustic engineering team can recommend a suitable HVAC sound attenuator configuration and provide project-based pricing.

Request a Quote