The Rieter APAMAT II simulates the combination of structure-borne and airborne excitation the car-body panels are subjected to under normal driving conditions. Even though the measurements are carried out in a laboratory, the results are valid and reliable and correspond well to the conditions encountered in practice.

It has been designed because a comprehensive system for the overall acoustic efficiency measurements did not exist. The problem was that the existing methods to separately measure transmission loss, damping and absorption were not always sufficient to compare and classify those soundproofing systems currently used in the automotive industry.

Rieter APAMAT II fills this gap and enables its users to comprehensively measure the overall acoustic efficiency of automotive noise control treatments and materials.
The excellent suppression of secondary transmission paths in Rieter APAMAT II leads to a high dynamic range, making it particularly suitable for measurements on modern, high-performance noise control treatments.

The unique benefits:

• unique combination of structure and airborne excitation
• measurements are particularly quick and easy to perform
• very robust, stable and durable system
• makes an overall acoustic efficiency measurement possible that indicates how materials will perform in the vehicle
• compare and classify those soundproofing systems currently used in the automotive industry with one single system
• for the development of new materials and concepts
• consistently reliable results
• the right choice for comprehensive acoustic treatment measurements

The Rieter Isokell system has been designed around the need to measure the transmission loss of automotive components according to a Recommended Practice introduced by the SAE (J1400) as a flexible acoustic insulation measurement method specifically for the automotive industry. The Rieter Isokell system is less cumbersome, less costly and perfectly suited to the industry’s needs than those methods designed traditionally for the measurement of building acoustics. And the results it provides can still be correlated with those from international standards.


The unique benefits:
• save time thanks to horizontal sample mounting
• measure flat samples or components
• fast and easy measurement procedure thanks to user-friendly software interfaces
• its reduced size means it can be moved to a new location
• used in combination with the Rieter Alpha Cabin, it can also be used to measure absorption

Technical details:
Overall dimensions:
3.4 x 2.5 x 4.75 m (L x W x H)
Sample apertures:
1.0m x 1.2m (standard flat samples)
1.5m x 2.0m (larger parts)
Frequency range:
125 to 5000 Hz

results comparable with ISO standards facilities

Rieter Porpos uses the "air-based" method to measure the porosity (ratio of air to overall volume) of felts and foams. Via a process of compressing and de-compressing air the sample porosity can be derived from the resulting pressure changes. Rieter Porpos is perfectly suited not only for experts: it guides the user through the preparation and the software controls the measurement cycle as well as evaluates the results.

The unique benefits:
• fast, easy and straight forward measurement procedure thanks to very user-friendly software interface
• software evaluates results for you
• applicable to a wide range of porous materials such as felts and foams
• samples measured can go up to practically 100 % porosity (only air)
• high quality measurements that you can expect form Rieter Systems

Key to a comprehensive material database: airflow resistance of porous materials

The Rieter AFR (Airflow Resistance Measurement) System was designed by Rieter acoustics experts to measure the airflow resistance of porous materials in an easy way without compromising in measurement quality. Rieter AFR measures according to ISO standard 9053.

The Rieter AFR (Airflow Resistance Measurement) System was designed by Rieter acoustics experts to measure the airflow resistance of porous materials in an easy way without compromising in measurement quality. Rieter AFR measures according to ISO standard 9053.

The unique benefits:

• rapid and easy installation of the measurement samples thanks to sample holder with supportive grip
• thanks to the special sample holder the measurement of thin materials such as fabrics or non-wovens is possible
• being small and portable Rieter AFR can be used anywhere
• easy to operate also for non-experts
• very robust, stable and durable system
• high quality that you can expect from Rieter
• the right choice for airflow resistance measurements

The Rieter Alpha Cabin has been specifically designed for the measurement of the acoustic absorption characteristics of materials and parts used in noise control in road vehicles. The Rieter Alpha Cabin is one third the size of an international standard reverberation room which makes it an ideal measurement system for the automotive industry. The acoustic absorption of the Rieter Alpha Cabin itself is very low and the design ensures a high level of sound insulation to keep the background noise level very low in the frequency range of interest.

The unique benefits:

• the right system to use during the development of optimised vehicle sound packages
• worldwide standard used by most OEMs and suppliers
• fast and easy measurement procedure thanks to user-friendly software interfaces
• it provides results that allow specifications to be set for the absorption properties of NVH products
• also ideal as a quality control system
• an R&T tool for the development of new materials and parts
• its reduced size means it can easily be moved to a new location
• used in combination with the Rieter Isokell, it can also be used to measure transmission loss

Generalist for the quick and easy overall acoustic treatment measurement

The Rieter APAMAT II simulates the combination of structure-borne and airborne excitation the car-body panels are subjected to under normal driving conditions. Even though the measurements are carried out in a laboratory, the results are valid and reliable and correspond well to the conditions encountered in practice.

It has been designed because a comprehensive system for the overall acoustic efficiency measurements did not exist. The problem was that the existing methods to separately measure transmission loss, damping and absorption were not always sufficient to compare and classify those soundproofing systems currently used in the automotive industry.

Rieter APAMAT II fills this gap and enables its users to comprehensively measure the overall acoustic efficiency of automotive noise control treatments and materials.
The excellent suppression of secondary transmission paths in Rieter APAMAT II leads to a high dynamic range, making it particularly suitable for measurements on modern, high-performance noise control treatments.

Quick and simple measurements of airborne transmission characteristics in apertures and sealing systems

The Rieter Small Cabin was designed following the requirement to reliably determine the attenuation characteristics of soundproofing treatments under airborne noise excitation. It is suitable to measure a wide range of materials, parts and complete installations such as pedal assemblies, sealing systems for apertures in firewalls, and many more. With its versatility, accuracy and small size the Rieter Small Cabin is the perfect solution to investigate soundproofing treatment transmission properties.

The Rieter Small Cabin was designed following the requirement to reliably determine the attenuation characteristics of soundproofing treatments under airborne noise excitation. It is suitable to measure a wide range of materials, parts and complete installations such as pedal assemblies, sealing systems for apertures in firewalls, and many more. With its versatility, accuracy and small size the Rieter Small Cabin is the perfect solution to investigate soundproofing treatment transmission properties.

The unique benefits:
• the right choice to investigate insulation properties of small soundproofing treatments
• also ideal as a quality control system
• its reduced size makes it easily transferable to a new location
• adaptable to a wide range of materials and parts

Technical details:
Overall dimensions:
0.92 x 0.92 x 1.84 m
Accommodated sample size:
840 mm x 840 mm
Frequency range:
100 – 10’000 Hz

The Rieter Carrousel measures the dynamic vibration properties of test strips consisting of various materials that can be coated or not-coated. The method is based on the classic Oberst procedure where Rieter has improved both the measuring procedure itself and the mathematical model used to evaluate the results. The Rieter Carrousel software automatically evaluates the damping loss factor at various modes and temperatures as well as controlling both the Rieter Carrousel apparatus and the all-important temperature when measuring in a temperature chamber.

• Rieter Carrousel with a 20 sample holder
has the advantage of producing fast results especially when measurements of more samples are needed. This feature makes it also suitable for quality control.

The engine bay is the source of all thermal and acoustic issues in a car. Rieter Automotive Systems has a wide range of well-designed products combining both these properties:

• engine covers
• hoodliners
• outer dash insulators / outer tunnel insulators
• water box shields / plenum chamber and battery trays

Working closely with our customers, we are developing engine-mounted or body-mounted engine encapsulations with the focus on acoustics and/or heat storage management aimed at lowering fuel consumption, reducing emissions and improving acoustics.

Rieter ENS (Engine Noise Simulator) was designed as a realistic sound source when investigating the airborne noise transmission between engine and passenger compartment of a vehicle. It is basically a simplified model of the engine/gearbox unit of a small to medium sized car.

Compared to a simple sound source, Rieter ENS has the advantage of being a realistic representation of a vehicle power unit and thus, of producing valid measurements. It allows for special problems associated with noise radiation from specific engine surfaces to be studied.

ELWIS (Evaluation of Light Weight Impedance System), the latest addition to the Rieter Measurement System portfolio, allows for the full and rapid characterization of porous materials.
Whereas the evaluation of different acoustic concepts usually requires a large database of material measurements, ELWIS only needs a single sample of a porous material from the manufacturing line, or from a vehicle component.

The Rieter ELWIS system consists of the applications ELWIS-A and ELWIS-S which can be used separately, however, are both needed for a complete material simulation.
Rieter ELWIS-A evaluates acoustic parameters that are needed to evaluate the acoustic performance of sound insulation and sound absorbing multi-layer treatment.
Rieter ELWIS-S measures structural parameters (including the “Poisson Ratio” for foam materials) that are needed to simulate the dynamical and acoustical behaviour of real finite-size sound package parts in the medium to low frequency range.

The Rieter ELWIS system is very easy to operate: thanks to its user-friendly software, users with only limited expertise on porous material characterization can use Rieter ELWIS and obtain correct results.

The unique benefits:

• The right tool for obtaining the material parameters used input data for component simulation using e.g. SISAB or SEA
• the right choice to quickly compare the performances of different sound package solutions or materials
• software can easily be operated also by non-experts
• rapid, easy and reliable data evaluation, only needs a single sample of a porous material
• supersedes large databases with material parameters to make the right decision regarding sound packages
• can also be used as a quality control system
• adaptable to a wide range of materials and parts
• combines the benefits of inverse methods together with innovative post-processing and material knowledge

With our process and material know-how and a wide variety of face materials, we provide a range of trunk parts with the added value of styling expertise by IDEA Institute:

• trunk side trim
• trunk flooring
• other trim parts (e.g. tailgate trim)
• spacers

RIETER ULTRA SILENT™ is the lightweight fiber technology for underfloor panels and under engine shields. With its high performance and competitive economics it provides the best-in-class combination of absorption and high stiffness. It is 100% glass-free PET and fully recyclable. The unique technology allows car manufacturers to achieve all future performance, weight and environmental targets and is based on a patented material-process combination developed jointly by Rieter Automotive Systems and Rieter Textile Systems.

• 1.5 db (A) / 3% average Sound Pressure Level (SPL) improvement of exterior noise compared to solid plastics solutions
• on one specific vehicle example: 2.7kg (45%) lower weight was achieved on the underbody package

Underbody shields in RIETER ULTRA SILENT™ technology can be combined with an acoustic heat shield system to further improve exterior noise and provide excellent thermal management.

Rieter Automotive Systems is the leading supplier of specialized measurement systems for automotive acoustics since 40 years. As an integral part of its engineering activities, Rieter Automotive Systems is continuously developing innovative systems and equipment to measure component and material properties related to NVH control and thermal management. These specialist systems have become industry standards and are used throughout the world.

Rieter Acoustic Measurement Systems help to time-efficiently evaluate several potential acoustic solutions. This way our customers are enabled to make the right decision when developing acoustic packages and at the same time stay on top of industry developments in the field of sound packages and heat shields, quality control and treatment performance prediction.

• standard-setting technology that is used by most OEMs and suppliers
• each application is designed and built by Rieter acoustic specialists
• technical support from Rieter experts
• fast and easy application thanks to user-friendly software interfaces
• accurate, reliable and immediate measurements
• the right choice to develop or optimize vehicle acoustic packages

Our expertise in damping materials and processes is applied to a range of solutions:

• dampers / stiffeners (such as heat fusible, magnetic,
  constraint, expandable, self-adhesive, obturating)
• sealants

The result of our damping expertise coupled with our proprietary simulation methods like GOLD lead to an optimized damping package: 20% increase in performance, lower weight and lower costs. Our lightweight damping applications provide improved performance, less weight, lower fuel consumption and lower emissions.

The control of airflow resistance in the production of materials and components is a growing requirement in today’s automotive industry. Rieter CARE + (Concentric Airflow Resistance Evaluator) is an apparatus designed to non-destructively measure the airflow resistance of materials and parts in the range 200 to 4000 Ns/m3. Measuring non-destructively, Rieter CARE + is particularly applicable in the quality control of parts and materials.


The unique benefits:

• non-destructive air flow resistance measurements
• ideal as quality control system
• measures single or multi-layer materials or parts
• easy application: simply calculate airflow resistance from pressure difference displayed on the manometer
• the right choice for airflow resistance measurements of materials and parts

Technical details:
Overall dimensions: 440 x 180 x 305 mm (L x B x H)
Bell overall dimensions: 145 mm
Recommended range of airflow resistances: 200 to 4'000 Ns/m3
Recommended sample thickness: less than 20 mm

• Engine Bay
• Interior Trim
• Interior Floor
• Trunk
• Underbody
• Body Treatment
• Truck
• RIETER ULTRA LIGHT ™
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Rieter Automotive Systems has in-depth expertise in carpet surfaces and a broad know-how of converted and integrated floor systems. Add to this our outstanding vehicle acoustics and lightweight solutions such as RIETER ULTRA LIGHT™ and you have a wide range of products for complete interior floor systems:

• inner dash insulators
• needlepunch carpets
• tufted carpets
• non-textile flooring
• floor insulators
• floor mats
• spacers/crash pads

Our latex-free needlepunch carpet is hard wearing, provides uniform coverage and it's environmentally friendly. It is proven in high volume vehicles

1st Automotive Acoustics Conference
organized by Rieter Automotive, ATZlive and ETH Zurich

July 7 - 8, 2011 Zurich

The international Automotive Acoustics Conference will be showing the trends and the state of the art with regard to how acoustics can contribute to developing automobiles of even higher quality. Under the patronage of Professor Paolo Ermanni, ETH Zurich, the conference will bring together various experts from different parts of the functional chain: from research and development in industry, from university research and from OEMs, suppliers, development service providers, software suppliers and experts in measurement technology.

We look forward to your attendance.

Dr. Maurizio Mantovani

the pioneer of lightweight acoustic treatment

RIETER ULTRA LIGHT™ is the family of lightweight acoustic products for carpet systems, inner dashes, parcel shelves and trunk trim. It replaces insulation with absorption to significantly reduce part weight while optimizing acoustic performance. The technology is based on a patented high performance construction and satisfies OEM requirements for both foam and fiber solutions.

Lower weight, fuel consumption and CO₂ emissions - some facts and figures about RIETER ULTRA LIGHT™:

• Weight reduction of an acoustic package by 14kg (up to 50%) achieves 0.5% lower fuel consumption and lower CO₂ emissions
• acoustic performance is equivalent to heavier conventional solutions
  
• up to 80% of the product content is of non-oil based raw materials
  
• easy to recycle
  
• 6.6 milion tons of CO₂ emiss