Sound Attenuators 

AttenuatorAcoustic Attenuator controls noise generated by air or gas flows while providing sufficient airflow for the applications. The main reason to use acoustic attenuators for noise control in an industrial environment is that excessive industrial noise will cause damage to staff’s hearing and may lead to hearing loss.

C-Mac Industrial Acoustic Exhaust Sound Attenuators are purpose built sound attenuators with removable and re-packable internals.

Industrial Light Weight Splitters are manufactured to the high level of noise reduction that allow adequate passage of air for internal applications and external applications.

Exhaust Sound Attenuators - Rectangular Silencer or Circular silencer 

Sound Attenuators are basically duct type silencers and are normally rectangular or circular.

Commonly circular silencers are either    

  • 1 x diameter in length
  • 2 x diameter in length and could require a centre pod. The 2 x length version provides better acoustic performance.
  • Special extra long silencers are designed for specific circumstances.

Rectangular silencers have different splitter configurations varying in thickness.

  • Open areas are generally calculated between 25 – 50%. Smaller the open area the better the sound proofing
  • Depending on air speed acoustic filling may require special retention methods so it doesn’t deteriorate and depart on air discharge.

Acoustic Silencers & Attenuators Applications:

  • Industrial centrifugal and axial fans
  • Plant room ventilation (air inlet and outlets)
  • Dust extraction systems (dust control equipment)
  • Air compressors
  • Exhaust plenum chambers
  • Air conditioning installations (plant rooms)
  • Cooling towers (silencers)
  • Positive displacement blowers
  • Diesel engines driven generators and other machinery
  • Frequently used in conjunction with Acoustic Enclosures
  • Silencers for exhaust fans (Motor cooling fans)
  • Power generation equipment
  • Outdoor air ventilation systems
  • Refrigeration plant
  • Fans (Rectangular and Circular) and blower inlets and outlets
  • Gas Turbines
  • Compressors
  • Roots Blowers
  • Steam and Gases
  • Reactive Silencers
  • Air relief silencers
  • Vent and Blow down silencers for air

Click here for help & quotation We HELP to select the right silencers for your application

Why Use C-Mac Acoustic Silencers & Sound Attenuators?

SQI-9001-2015-QualityApproved-JASANZHigh Quality

  • Manufacturer leader in Noise Control Engineering for over 40 years in Sydney Australia
  • Satisfactory results and guaranteed performance  
  • ISO 9001:2015 certified with high quality ensured
  • Industrial quality providing long life and low maintenance

Short Lead Times

  • Australian-Made-(for-web)Support from in-house Sheetmetal Fabrication and Engineering staff with over 50 years of experience.
  • Support from experienced in-house design engineers with manufacturing experience.
  • Quality customer service through prompt response and delivery     

Customisable and Flexible

  • Various models available to satisfy differing noise, airflow and space requirements.
  • Circular or rectangular attenuators depending on pipe work.
  • Elbow or bent attenuators
  • Cross-talk attenuators for privacey of conversations
  • Custom flanges made to suit application
  • Different colour and finishes available
  • Manufactured from galvabond, stainless steel and aluminium to suit applicable environment

Click here for Acoustic Products Case Study

Click here for "Plant & Equipment Finance"

Contact our experienced acoustic engineers on 02 9631 6000 or Click here for help & quotation

Back to Top

Discuss or Get a Quote