Noise Source Definition - Exterior Passenger Vehicle Noise

1972 ◽  
Author(s):  
R. J. Vargovick
Keyword(s):  
Noise Source ◽  
Passenger Vehicle ◽  
Vehicle Noise

Method for Measuring Vehicle Noise Source Heights and Subsource Spectra

1996 ◽  
Vol 1559 (1) ◽  
pp. 8-13
Author(s):  
Robert Coulson
Keyword(s):  
Noise Source ◽  
Traffic Noise ◽  
Regression Equations ◽  
Department Of Transportation ◽  
Vehicle Noise ◽  
Level Data ◽  
Analysis System ◽  
Transportation Agencies ◽  
Rapid Data Acquisition ◽  
Subsequent Incorporation

The U.S. Department of Transportation in cooperation with FHWA and several state transportation agencies is collecting a highway noise database for the development of noise-level regression equations. These data and equations will provide the foundation for the new traffic noise software, TNS. In addition to collecting reference energy mean emission level data, this test plan also requires an extensive database of source heights and subsource spectra covering all vehicle classes and possible roadway parameters. A description is provided of a turnkey rapid data acquisition and analysis system that was developed to collect a large database of vehicle noise source heights and subsource spectra for subsequent incorporation into TNS. Included is a summary of the analysis algorithm used to calculate the source heights, a description of the data collection system, and a brief summary of the data collected to date.

Mapping Heavy Vehicle Noise Source Heights for Highway Noise Analysis

2017 ◽  
Author(s):  
Paul R. Donavan and Carrie J. Janello ◽  
◽  
◽  
Keyword(s):  
Noise Source ◽  
Noise Analysis ◽  
Heavy Vehicle ◽  
Vehicle Noise ◽  
Highway Noise

Development of a Fast Procedure for Vehicle Noise Source Quantification

2007 ◽  
Author(s):  
Dries Berckmans ◽  
Paul Sas ◽  
Wim Desmet
Keyword(s):  
Noise Source ◽  
Vehicle Noise ◽  
Fast Procedure

scholarly journals Assessment of acoustic pollution of areas bordering highways

2021 ◽  
Vol 937 (2) ◽  
pp. 022055
Author(s):  
E V Antonenko ◽  
A Yu Melnichuk ◽  
V V Popovich
Keyword(s):  
Traffic Flow ◽  
Noise Level ◽  
Motor Vehicle ◽  
Noise Source ◽  
Research Result ◽  
Maximum Level ◽  
Vehicle Noise ◽  
Acoustic Load ◽  
The Republic

Abstract The work is devoted to the peculiarities of acoustic pollution of roadside territories. The studied territory is characterized by uneven acoustic load on the experimental sections of the highways of the Republic of Crimea, which is associated with the peculiarities of traffic flow and technical characteristics of cars. The article considers the indicators of the equivalent and maximum levels of motor vehicle noise. As the research result, the excess of noise level from 10 to 30 dBA was revealed. The maximum level of acoustic pollution was recorded in 10-meter zone, at a distance of 30 m from the noise source the level of acoustic pollution is reduced to 5-10 dBA.

Identification of the Vehicle Noise Source by Sound Intensity Method

2011 ◽  
Vol 346 ◽  
pp. 634-638 ◽  
Author(s):  
He Li ◽  
Qing Rong Zhao ◽  
Bang Chun Wen
Keyword(s):  
Power Spectrum ◽  
Noise Source ◽  
Sound Intensity ◽  
Regulation System ◽  
Sound Power ◽  
Analysis Software ◽  
Noise Sources ◽  
Vehicle Noise ◽  
Measurement Results ◽  
Radiation Noise

In this paper, we analysed the level of radiation noise and distribution of noise sources of car’s engine and front panels by using sound intensity method. To get the nephogram of sound intensity and sound power spectrum, we used the sound intensity probe and Multi-channel Data Acquisition Regulation System B&K 3560-D and Pulse Data Processing Analysis Software. By analysing experimental results, we can conclude the location of noise sources of these parts. The measurement results will serve as a reference for the car noise reduction.

Noise Reduction for a Given Vehicle Based on Sound Intensity Measurement Method

2012 ◽  
Vol 503-504 ◽  
pp. 1212-1215
Author(s):  
Zhi Xin Liu ◽  
Yong Wan Shi
Keyword(s):  
Noise Source ◽  
Sound Intensity ◽  
Operating Conditions ◽  
Engineering Practice ◽  
Noise Generation ◽  
Vibration Signals ◽  
Vehicle Noise ◽  
Noise Source Identification ◽  
Radiation Noise ◽  
Reliable Basis

In this paper the mechanisms of the bottom radiant noise generation of a given mini vehicle was investigated and the corresponding countermeasures were put forward in reducing the noise of a diesel engine. According to the analysis of acoustic signals and vibration signals measurement, an investigation of the noise source identification in a given vehicle was presented. With the sound intensity method, the major sources of the bottom radiation noise of the engine under three operating conditions were surveyed. The research provides the reliable basis for the engineering practice to reduce vehicle noise level.

Determination of vehicle noise source levels

1987 ◽  
Vol 81 (S1) ◽  
pp. S47-S48
Author(s):  
Richard C. Smart ◽  
Stanley E. Dunn
Keyword(s):  
Noise Source ◽  
Vehicle Noise

Development of Dash insulation with PU elastomer based sound insulation materials for increasing the sound insulation performances of electric vehicle noise derived from motor

2021 ◽  
Vol 263 (5) ◽  
pp. 1804-1806
Author(s):  
Minji Yu ◽  
Jang-Seok Park
Keyword(s):  
Noise Source ◽  
Fuel Efficiency ◽  
Acoustic Properties ◽  
Sound Insulation ◽  
Efficiency Improvement ◽  
Design Modification ◽  
Vehicle Noise ◽  
Noise Characteristics ◽  
Pu Foam ◽  
International Regulations

At present, fuel efficiency improvement technologies for example weight, engine efficiency improvement, design modification, and eco-friendly car are being proceed due to the tightened international regulations. Therefore, production of eco-friendly cars specially electric car has increased. Due to that, the main noise source has changed from engine to motor noise and road noise as it has been changed from engine cars that have led engine technology to eco-friendly cars. As the noise source has changed, it is necessary to manufacture sound absorption/insulation structure for the noise characteristics generated by electric vehicles. In this work, the elastomer sheet was applied to the Dash outer as automotive terior parts for reducing engine noise. We applied the elastomer sheets for generation Dash outer layers (nonwooven/PU foam/nonwooven) to improve sound insulation properties. The elastomer sheet showed surface wetting between PU foam and elastomer sheets by optical microscopy. The acoustic properties were measured by APAMAT-II and BUCK tests.

Sign in / Sign up

Export Citation Format

Share Document