vehicle noise Articles

  • Recent research on vehicle noise and vibration

    Vehicle noise, vibration and harshness (NVH) is usually among the top five attributes in terms of its priority in the design of automotive vehicles. Its priority in other types of vehicles (e.g., aerospace) is also important. Like other attributes of safety, performance, dynamics, fuel economy, NVH has to be considered closely in the design process. This manuscript presents a summary of recent ...


    By Inderscience Publishers

  • Vehicle–road interaction for interior noise measurement and evaluation

    Nowadays, one of the most valuable criteria of vehicle quality assessment is based on acoustic emission levels. A vehicle is judged comfortable depending on the noise levels transmitted inside. Consequently, there is a general attention to the design criteria aimed at improving the structural acoustic behaviour, to comply with the increasingly restrictive ergonomic standard. Therefore, it is ...


    By Inderscience Publishers

  • Multivariate statistical analyses of idle noise and vehicle positioning

    Principal component analysis (PCA) and correspondence analysis (CA) are applied to characterise the differences in engine idle noise and market position analysis. The first principal component represents overall sound pressure level (SPL) showing general noise level and the second principal component as SPL at low frequencies between 25 Hz and 50 Hz. Principal component scores are used as a way ...


    By Inderscience Publishers

  • In-situ noise level mapping for vehicle floor carpet

    Noise level mapping of test vehicles' floor carpets was undertaken for three frequency bands, that is, low-(2,000 Hz) to compare noise control treatment performance and effectiveness. On-road tests including idling conditions and constant speed tests of 40, 60 and 80 kph were undertaken. Noise level contour maps indicate that the luxury class test vehicle ...


    By Inderscience Publishers

  • Using neural networks to identify annoying noises in vehicles

    Previous papers have developed a methodology to characterise squeaks and rattles. Thus, for each noise, its origin and the means for eliminating it, are known. This paper describes the work done towards the development of a tool, based on neural networks, that determines if a squeak or rattle corresponds to any of the noises already characterised. Different types of neural networks have been ...


    By Inderscience Publishers

  • On the right track

    High-speed train manufacturer, CAF, rely on world-class beamforming technology to reduce the noise generated by their trains – helping to make high-speed trains a more viable option for travellers and operators alike. Because of its relatively low levels of CO2 emissions, train travel is considered one of the ...

  • Investigation into noise problems in vehicle structure using vibro-acoustic approach

    The main focus of this paper is the study of the relationship between components of vibration and noise inside the passenger cabin of a production vehicle. The noise inside automobiles is largely composed of contributions from the engine, ground and wind. The engine and tyres successively transfer the vibration via the structural connections to the body panels, which then propagates through the ...


    By Inderscience Publishers

  • Characterisation of adaptive filters used in the identification process of annoying noises in vehicles

    To identify annoying noises (squeaks and rattles) inside vehicle cabins, it is necessary to capture the sounds present inside them and eliminate or attenuate all external noises from the obtained signal by using LMS, RLS or Kalman adaptive filters. This work aims to characterise the performance of these filters and select the one most suitable for this application. Analytical and experimental ...


    By Inderscience Publishers

  • The sound quality of vehicle interior noise: a challenge for the NVH-engineers

    The sound quality of vehicle interior noise has become a very important task for the acoustic engineers since more than 20 years. As vehicles become more and more quiet, the customer's sensitiveness for the acoustical comfort increases. On the one hand, no disturbing noises should be heard and on the other hand, the perceived sound quality, for example from the powertrain, should fulfill the ...


    By Inderscience Publishers

  • Characterisation of vehicle seat rattle noise from seat structural dynamics

    The vehicle seat has robust structural dynamics characteristics which typically comprise of a maximum of three known vibration mode shapes at low frequencies ( ...


    By Inderscience Publishers

  • Rating criteria for vehicle in-cabin noise with emphasis on HVAC system operation

    Noise and vibration have an important influence on a customer's perception of vehicle quality. It is the purpose of this study to introduce a standard test procedure for measuring vehicle in-cabin noise levels. A combined vehicle base noise with all possible sources, including HVAC system, tyres, aerodynamics, under various driving conditions, is considered for developing the total vehicle cabin ...


    By Inderscience Publishers

  • Methodology to determine component shell noise targets of vehicle induction systems

    This paper describes a study that utilises transfer path analysis to quantify the shell noise contribution of a production air cleaner and compares the results to a prototype air cleaner with different surface characteristics. This technique utilises the surface velocity of the intake manifold and air cleaner and the transfer function of both components to predict the sound at the driver's ear. A ...


    By Inderscience Publishers

  • Vehicle power-train noise refinement using the Taguchi method

    This paper involves an introduction of an approach to reduce powertrain noise where the Design Of Experiments (DOE) has been implemented. Decoupling tests have been conducted on a test car to identify the engine noise transmission paths into the cabin. Under each coupling/decoupling combination, sound pressure levels at ear locations have been measured and evaluated in the second gear slow ...


    By Inderscience Publishers

  • Overview of automotive noise and vibration

    Vehicle noise, vibration and harshness (NVH) is an important vehicle attribute. It is usually among the top five attributes in terms of its priority in the design of any vehicle type. Like other attributes of safety, performance, dynamics and fuel economy, this attribute has to be considered closely in the design process. This manuscript presents an overview of automotive NVH engineering. It ...


    By Inderscience Publishers

  • Measuring Road Traffic Noise

    As part of an overall measurement programme to monitor road traffic noise in Århus (Denmarks second largest city), the Local Authority set up a noise measurement station on one of the major approach roads to Århus Harbour. This noise measurement station continually measures noise levels and can give a round-the-clock picture of noise level variations. Like most other districts, Århus Local ...

  • Is The `Beep` Noise Pollution?

    It is rare these days that you can be somewhere without noise pollution intruding on some level. Many natural noises may be welcome; a dawn chorus or waves breaking on the beach, but when it comes to man-made decibels it’s a different matter. Never mind the sounds of cars, ring tones and other noises that we take for granted, have you ever noticed how utterly surrounded we are by the humble ...


    By Cirrus Research plc

  • Noise Mapping in Lille

    Lille, with a population of 1091 million inhabitants is the 4th largest agglomeration in France after Paris, Lyon, and Marseille. Situated at the heart of a network of 464 km motorways connecting six European cities (Brussels, Bonn, the Hague, London, Luxembourg and Paris), the metropolis of Lille also has the densest railway network of France after Paris. Pascal Thomas and his team of 8 ...

  • Urban Noise Monitoring in Madrid

    Dynamic mapping helps Madrid improve the quality of life for her citizens and visitors alike. With its 3 000 000 inhabitants and 2500 km of streets, Madrid is an excellent example of what can be done to improve human comfort related to urban noise. Since the late 60s, Madrid City Council has been working on noise problems. During this period, global environmental analysis has focused on how ...

  • Technological methods for noise/vibration reduction in driveline/transmission of trucks and all-wheel-drive vehicles

    The paper is targeting solution to the problem of noise/vibration reduction in driveline/transmission of a truck and all-wheel-drive vehicle. It is customary to modify the gear micro-geometry to accommodate misalignment and minimise transmission error in a truck transmission. Various possible kinds of modification of a pinion tooth surface are considered. Topological modification of a pinion ...


    By Inderscience Publishers

  • Comparative study of frequency domain filtered-x LMS algorithms applied to vehicle powertrain noise control

    Currently, passive noise control treatment is widely applied to treat vehicle powertrain noise. However, passive noise control technology is often not effective in the low frequency range where the response is typically the most dominant component. With the rapid development of digital signal processing, active noise control (ANC) can be a feasible alternative. In this study, an enhanced ...


    By Inderscience Publishers

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