Air Springs Supply advises that noise, vibration and harshness (NVH)
issues in industrial and commercial buildings can be eliminated by cutting the
problem off at its source.
Companies can save a lot of money by considering relatively inexpensive
ways to isolate the source of the NVH trouble using simple inflatable or solid
rubber mounts instead of investing in extensive sound-deadening materials or
requiring staff to wear personal protection equipment in affected areas.
Inflatable Airmount air springs and complementary solid engineered
fabric and rubber Marsh Mellow springs available from Air Springs Supply are already
proven globally in applications ranging from extreme isolation of operating
tables in hospitals, and computer and electronics installations, through to
outstandingly effective dampening of the din and shaking created by huge
shakers, crushers, metal stamping, compressors and generators in industrial
These solutions have helped buildings achieve isolation efficiencies of
up to 99 per cent for their NVH sources ranging from emergency electricity
generators and HVAC plants in high-rises through to a swimming pool in an
exclusive Australian hotel where the entire pool was mounted on air springs to
ensure its glassy surface was isolated from disruptive trains rumbling by in
nearby tunnels and other heavy vehicle traffic. The pool application also prevented
the sounds of diving and aquatic activities from transmitting through to the
hotel rooms below.
James Maslin, National Marketing Manager for isolation and actuation
specialist Air Springs Supply Pty Ltd, observes that it simply makes sense to consider
prevention before cure to avoid NVH issues. Air Springs Supply is the long
established national distributor of Firestone industrial products.
A common problem in industrial and commercial buildings, NVH is not only
a workplace hazard to the human occupants of buildings, disrupting employee
comfort and safety and increasing employer liability, but can also impact the
daily function of instruments and computerised building systems, including
automation systems and process control and materials handling systems.
According to Mr Maslin, the environmental NVH problem was not seen as a
threat many years ago by building specifiers and their clients, with the issue considered
as typical background noise in just about every industrial plant or commercial
However, with increasing awareness over the last decade about the health
issues associated with NVH, as well as heavy dependence on electronic equipment
at industrial and commercial workplaces, buildings are required to ensure a
quieter environment free of vibration and shock to protect both workers and
Air Springs has responded to the industry need for simple, reliable and
highly efficient ways to tackle NVH by offering an extensive range of
inflatable Airmount isolators.
Airmounts are available in an expanded range of sizes from palm-sized to
nearly a metre across to individually support weights extending from under
100kg up to more than 40,000kg, which have been used as actuators to lift
mining draglines for maintenance.
Mr Maslin explains that the simple isolators contain no internal moving
parts to wear, or metal springs or surfaces to corrode or break. The Airmounts
are extraordinarily tough, being manufactured by Firestone in exactly the same
way as the air springs used in the suspensions of luxury coaches, heavy trucks
and express trains such as NSW’s XPTs and France’s TGVs.
Air Springs Supply’s single, double and triple-convoluted Airmount
isolators as well as rolling sleeve models and complementary Marsh Mellow
isolators have been refined to achieve isolation efficiencies exceeding 99 per
cent in some instances. The Airmounts are carefully constructed and permanently
installed to deliver a range of performance requirements across a very broad
spectrum of needs from suspension of a 30kg computerised control panel to total
suspension of the entire 100-tonne bulk of a huge motor, crusher, press or
production line, and even entire generators and HVAC plants in commercial
Marsh Mellow springs, also engineered by Firestone and working complementary
to Airmounts, are tubular isolators comprising of a solid rubber core
surrounded by bias layers of fabric engineered to the needs of particular
applications. Simpler in design and function than Airmounts, Marsh Mellows
don’t even need to be inflated and are one of the latest isolation techniques
to achieve international acceptance.
Marsh Mellow springs are capable of solving industrial shock and
vibration isolation problems arising out of the use of metal spring isolation
including noise, short spring life, corrosion, abrasion, bottoming-out and high
maintenance costs with lengthy downtime.