NAP Silentflo


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Manufacturers of Noise Control Equipment

NAP Silentflo (National Acoustic Products) is an Australian-owned company, which manufactures noise control equipment in South East Asia. NAP has advanced products to solve a range of noise problems in architectural, commercial or industrial environments.

Email Address
Level 1,
1040 Dandenong Road,
Carnegie 3163,
Fax Number

Noise control equipment

NAP Silentflo (National Acoustic Products) is an Australian-owned company, which manufactures noise control equipment in South East Asia. NAP has advanced products to solve a range of noise problems in architectural, commercial or industrial environments.

Silencers, mufflers and sound-control doors and enclosures

More than 40,000 NAP silencers, louvres, mufflers, doors and enclosures have been supplied to customers throughout Australia, New Zealand, Hong Kong, China, Singapore, Malaysia, Thailand, Indonesia and Taiwan. Since being established in 1978, NAP has supplied a range of noise control equipment, including audiology suites, safe speech rooms, industrial enclosures, acoustic barriers, FD and ID fan silencers and vent silencers.

We also work with resonator silencers, timber and steel acoustic doors, gas turbine noise control, mufflers, reverberation control, vibration isolation, floating floors, mobile testing laboratories and diesel engine noise control.

An extensive range of acoustic doors are custom-built to suit individual needs.
Our eco-barriers help reduce noise from roads and railways in high-density urban areas.
Gas turbine exhaust silencers are available to suit all types of turbines.
NAP Circular silencers are used to control the passage of noise along an air path.
Rectangular silencers control noise from fans and blowers, cooling towers, dust extraction systems and other air or gas handling equipment.

Support for silencers and acoustic equipment

NAP has a number of technical catalogues, which provide acoustical, aerodynamic and physical data on individual products.

In addition, technical bulletins are available for consultants and engineers, which provide information on our products. The catalogues cover a thorough selection of our most popular products, and can be used by experienced acoustic and mechanical consultants, designers, plant or project engineers and architects.

Sales and projects engineers are able to assist those who have little experience, and can evaluate specific requirements. They are also able to help with the design, product selection, budgeting and tender submission and project planning. For those requiring a more comprehensive level of technical support, our bulletins contain additional information. Our range of products includes:

  • Rectangular silencers
  • Circular silencers
  • Acoustic splitters
  • Acoustic louvres
  • Acoustic air handling units
  • Steel acoustic doors
  • Timber acoustic doors
  • Diesel engine mufflers
  • Blower silencers
  • Reactive industrial silencers
  • Absorptive industrial silencers
  • Acoustic enclosures
  • Safety valve and blowdown silencers
  • Sound-rated buildings
  • Absorption treatments
  • Air relief silencers
  • Audiometric booths
  • Anechoic rooms
  • Pressure vessel silencers
  • Mobile diesel acoustic enclosures
  • Exhaust gas purifiers
  • Spark arrester mufflers
  • Cooling tower silencers
  • Acoustic lagging
  • Acoustic screens and barriers
  • Resonator silencers
  • Gas turbine exhaust silencers

Unique noise control solutions

NAP Silentflo is able to create individual solutions for specialised noise control requirements. Our depth of experience and technical expertise gives us a reputation for innovative and cost-effective solutions, and our commitment to quality means we are the preferred suppliers for major projects throughout Australia and South East Asia.

Some of the commercial, industrial and resource projects in Australia and overseas we have been involved with include:

  • Naval Dockyards, Williamstown
  • Sydney Harbour Tunnel
  • Eastern Harbour Crossing, Hong Kong
  • Route 5 Tunnel, Hong Kong
  • MRT, Singapore
  • Taipei MRT, Taiwan
  • Loy Yang Power Station
  • Royal Children’s Hospital
  • Esplanade Theatres, Singapore
  • Hazelwood Power Station
  • North West Shelf Project
  • Victorian Arts Centre
  • Sydney Opera House
  • Indosiar, Indonesia
  • Parliament House, Canberra
  • Bank of China Building, Hong Kong
  • Tsim Sha Tsui Cultural Centre, Hong Kong
  • Dampier to Bunbury Pipeline

Experienced acoustic engineers

With innovative designs, technical excellence and a commitment to quality and cost-effectiveness, NAP is able to provide premium customer service. Focusing on research and development means that we are at the forefront of noise control technology and are able to find a solution to the most complex requirements.

We employ some of the most experienced acoustic engineers in South East Asia, and we have an emphasis on staff training. This means that we are able to take advantage of any new developments in the field. Furthermore, NAP Silentflo is dedicated to total quality control and we are ISO:9001 accredited.


Level 1
1040 Dandenong Road
Carnegie 3163

Email address
Fax Number