The Experts below are selected from a list of 2565 Experts worldwide ranked by ideXlab platform
Klaus Genuit - One of the best experts on this subject based on the ideXlab platform.
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Sound design concepts meeting minimum sound requirements—Advantages and disadvantages
The Journal of the Acoustical Society of America, 2013Co-Authors: André Fiebig, Klaus GenuitAbstract:A young field of activity for acoustic engineers has emerged in the context of vehicle Exterior Noise design considering the aspect of pedestrian safety. The fear of blind associations, public authorities, and governmental agencies to have a high collision risk for visually impaired persons with “quiet” vehicles led to the definition of new minimum sound requirements for hybrid and electric vehicles ostensibly leading to ten times fewer pedestrian and cyclist injuries. The requested sound should be detectable under a wide range of background Noises when a vehicle is traveling under 18 mi/h. It is still open, whether hybrid and electric vehicles cause verifiably a higher collision risk for vulnerable persons and consequently the German Federal Environmental Agency rejects the idea of introducing additional sounds to enhance the audibility of vehicles operating in electric mode. Nevertheless acoustic engineers have to deal with the new requirements in the context of vehicle Exterior Noise and must find sustainable solutions considering product sound quality, detectability of vehicles and Noise annoyance in equal measure. The paper will discuss the context-related need for additional sounds to improve pedestrian safety and the conceptual scope of sound design taking into account community Noise aspects.
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Significance of Psychoacoustic Aspects for the Evaluation of Vehicle Exterior Noise
The Journal of the Acoustical Society of America, 2008Co-Authors: Klaus GenuitAbstract:For 25 years acoustic engineers have been using specific measurement technologies and analyses to determine sound quality of vehicle interior Noise. However, with regard to Exterior vehicle Noise only standard measurements, e.g. the A‐weighted sound pressure level (ISO 362), have been used and interpreted so far. Extensive knowledge and experiences concerning the evaluation of interior Noise are still unutilized for an advanced assessment of vehicle Exterior Noise. Within EU research projects, such as SVEN or QCity, Exterior Noise was investigated, methods established and psychoacoustic analyses carried out. The relevance of vehicle Exterior Noise with respect to perceived product quality was underestimated for a long time. Today, manufacturers recognize the importance of Exterior Noise beyond the annoyance perspective. Vehicle Exterior Noise conveys an impression of product quality. By optimizing the product sound quality manufacturers can compete against others and meet increased requirements. Customers...
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ACOUSTICS2008/2103 Significance of Psychoacoustic Aspects for the Evaluation of Vehicle Exterior Noise
2008Co-Authors: Klaus GenuitAbstract:Since 25 years acoustic engineers have been using specific measurement technologies and analyses to determine sound quality of vehicle interior Noise. However, with regard to Exterior vehicle Noise only standard measurements, e.g. the A-weighted sound pressure level (ISO 362), have been used and interpreted so far. Extensive knowledge and experiences concerning the evaluation of interior Noise is still unutilized for an advanced assessment of vehicle Exterior Noise. Within EU research projects, such as SVEN or QCity, Exterior Noise was investigated, methods established and psychoacoustic analyses carried out. The relevance of vehicle Exterior Noise with respect to perceived product quality was underestimated for a long time. Today, manufacturers recognize the importance of Exterior Noise beyond the annoyance perspective. Vehicle Exterior Noise conveys an impression of product quality. By optimizing the product sound quality manufacturers can compete against others and meet increased requirements. Customers prefer vehicle sounds which match their expectations, also applying to the Exterior sound of a vehicle. The acoustical fingerprint of a vehicle - inside and outside - provides enormous marketing opportunities. This paper shows how the knowledge of sound quality analyses with regard to interior Noise can be transferred to the evaluation of Exterior vehicle Noise.
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SIMULATION OF VEHICLE Exterior Noise
2001Co-Authors: Roland Sottek, Winfried Krebber, Klaus GenuitAbstract:Within the framework of the European project SVEN (Sound Quality of Vehicle Exterior Noise) tools and methods will be developed to improve the situation of traffic Noise in cities and suburbs. In order to achieve this aim, the effects of vehicle Noise on human hearing have to be explored. Suitable measurements and analyses are used for the objective description of vehicle Exterior Noises and traffic Noises correlating with the subjective judgement and the physiological effects. This paper introduces a hybrid model for the calculation of binaural vehicle Exterior Noises. The model uses recordings of the main excitation signals (exhaust system, intake, engine, tires) and binaural filters describing the transfer paths from the sources to an artificial head standing at a distance of several meters outside the vehicle. The calculation method allows the simulation of any driving situation. A simulated pass-by situation is used as an example to show the effects of the partial sound events on the entire vehicle Exterior Noise. (A) For the covering abstract see ITRD E113232.
T. Tousignant - One of the best experts on this subject based on the ideXlab platform.
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Optimization of Electric Vehicle Exterior Noise for Pedestrian Safety and Sound Quality
Proceedings, 2018Co-Authors: Adrian Rosplesch, T. TousignantAbstract:Without the Noise of a running combustion engine, electrically driven vehicles are very quiet, sometimes even too silent to be noticed by other road users, especially pedestrians, putting their health and lives at risk. Therefore, authorities recommended the introduction of artificial Exterior Noise signatures to be emitted by vehicles with electric powertrains to ensure detectability and pedestrian safety. In response, many manufactures have already introduced synthesized Noise generation systems using Exterior loudspeakers.
Nadirah Darus - One of the best experts on this subject based on the ideXlab platform.
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Exterior Noise due to interaction of tyre-thermoplastic transverse rumble strips
Archives of Acoustics, 2017Co-Authors: Zaiton Haron, Mohd Hanifi Othman, Khairulzan Yahya, Mohd Rosli Hainin, Nadirah Darus, Lim Meng Hee, Mohd Salman LeongAbstract:Transverse rumble strips (TRS) are a common choice to reduce vehicle speed and increase driver alertness on roadways. However, there is a potential trade-off using them on rural roadway due to the Noise problem created when vehicles go over the strips. The present study investigated the Noise level, spectral analysis, and the possible Noise generation mechanism when the TRS is hit by a vehicle. Tenraised-rumbler (RR) and three-layer-overlapped (TLO) TRS were selected in this study as they have received complaints from the public. Results showed that RR generated a relatively higher Noise and impulse at a low speed, and increased sound level in each octave band. Based on these results, RR may irritate human ears even when the vehicle travels at a low speed. It was found that RR increased all Noise generation mechanisms of tyre-pavement interaction whilst TLO increased structural resonance, sidewall and surface texture vibration.
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Exterior Noise Due to Interaction of Tire-Thermoplastic Transverse Rumble Strips
MATEC Web of Conferences, 2017Co-Authors: Zaiton Haron, Mohd Hanifi Othman, Khairulzan Yahya, Mohd Rosli Hainin, Kamarudin Ambak, Nadirah DarusAbstract:Transverse rumble strips (TRS) are a common choice to reduce vehicle speed and increase driver alertness on roadways. However, there is a potential trade-off using them on rural roadway due to the Noise problem created when vehicles go over the strips. The present study investigated the Noise level, spectral analysis and the possible Noise generation mechanism when the TRS hit by a vehicle. Ten-raised-rumbler (RR) and three-layer-overlapped (TLO) were selected in this study as they have received complaints from the public. Results showed that RR generated relatively higher Noise and impulse at low speed, and increased sound level in each octave band. Based on these results, RR may irritate human ears even when the vehicle travels at low speed. It was found that RR increased all Noise generation mechanism of tire-pavement interaction whilst for the TLO increased structural resonance, sidewall and surface texture vibration.
Zaiton Haron - One of the best experts on this subject based on the ideXlab platform.
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Exterior Noise due to interaction of tyre-thermoplastic transverse rumble strips
Archives of Acoustics, 2017Co-Authors: Zaiton Haron, Mohd Hanifi Othman, Khairulzan Yahya, Mohd Rosli Hainin, Nadirah Darus, Lim Meng Hee, Mohd Salman LeongAbstract:Transverse rumble strips (TRS) are a common choice to reduce vehicle speed and increase driver alertness on roadways. However, there is a potential trade-off using them on rural roadway due to the Noise problem created when vehicles go over the strips. The present study investigated the Noise level, spectral analysis, and the possible Noise generation mechanism when the TRS is hit by a vehicle. Tenraised-rumbler (RR) and three-layer-overlapped (TLO) TRS were selected in this study as they have received complaints from the public. Results showed that RR generated a relatively higher Noise and impulse at a low speed, and increased sound level in each octave band. Based on these results, RR may irritate human ears even when the vehicle travels at a low speed. It was found that RR increased all Noise generation mechanisms of tyre-pavement interaction whilst TLO increased structural resonance, sidewall and surface texture vibration.
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Exterior Noise Due to Interaction of Tire-Thermoplastic Transverse Rumble Strips
MATEC Web of Conferences, 2017Co-Authors: Zaiton Haron, Mohd Hanifi Othman, Khairulzan Yahya, Mohd Rosli Hainin, Kamarudin Ambak, Nadirah DarusAbstract:Transverse rumble strips (TRS) are a common choice to reduce vehicle speed and increase driver alertness on roadways. However, there is a potential trade-off using them on rural roadway due to the Noise problem created when vehicles go over the strips. The present study investigated the Noise level, spectral analysis and the possible Noise generation mechanism when the TRS hit by a vehicle. Ten-raised-rumbler (RR) and three-layer-overlapped (TLO) were selected in this study as they have received complaints from the public. Results showed that RR generated relatively higher Noise and impulse at low speed, and increased sound level in each octave band. Based on these results, RR may irritate human ears even when the vehicle travels at low speed. It was found that RR increased all Noise generation mechanism of tire-pavement interaction whilst for the TLO increased structural resonance, sidewall and surface texture vibration.
Adrian Rosplesch - One of the best experts on this subject based on the ideXlab platform.
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Optimization of Electric Vehicle Exterior Noise for Pedestrian Safety and Sound Quality
Proceedings, 2018Co-Authors: Adrian Rosplesch, T. TousignantAbstract:Without the Noise of a running combustion engine, electrically driven vehicles are very quiet, sometimes even too silent to be noticed by other road users, especially pedestrians, putting their health and lives at risk. Therefore, authorities recommended the introduction of artificial Exterior Noise signatures to be emitted by vehicles with electric powertrains to ensure detectability and pedestrian safety. In response, many manufactures have already introduced synthesized Noise generation systems using Exterior loudspeakers.
