Detectability study of warning signals in urban background noises: A first step for designing the sound of electric vehicles

Misdariis, Nicolas; Gruson, Anais; Susini, Patrick

doi:10.1121/1.4805555

Cited by 5 publications

(4 citation statements)

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“…Several studies have proposed or compared different warning signal in terms of detection (Parizet et al, 2013; Robart, Parizet, Garcia, 2012; Voigt et al, 2011) one of them proposing a cross cultural experiments between German and Japanese subject (Yamauchi et al, 2012). Moreover in a study of Misdariis et al (2013) on the detection of several warning signals it was found out that reaction times are significantly and predominantly decreasing along the course of the experience (several days), meaning that a learning effect occurs.…”

Section: Ings Are Expected Introducing Lighter Vehicles (Olev 2013)mentioning

confidence: 99%

Electric Vehicles and Urban Noise Control Policies

Maffei¹,

Masullo²

2015

Archives of Acoustics

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Limited Traffic Zone (LTZ) is a planning strategy that is more and more adopted by municipalities in Europe to improve their environmental conditions. It consists in the prohibition for traditional vehicles to circulate in specific areas. Although the main aim is to tackle air pollution problems, positive effects are registered in terms of reduction of noise annoyance and in terms of improved "quality of life" if specific conditions are respected. On the other side under the drive of the global market, the number of circulating electric vehicles in urban sites is also increasing. In the next years we expect to experience a new and not well-known urban soundscape.In this paper is presented an overview of recent urban projects and policies that deal with noise control and how these experiences will match into the next years with the sound characteristics of new electric vehicles for private and public transportation.

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Section: Ings Are Expected Introducing Lighter Vehicles (Olev 2013)mentioning

confidence: 99%

Electric Vehicles and Urban Noise Control Policies

Maffei¹,

Masullo²

2015

Archives of Acoustics

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“…The scenario chosen for the test corresponds to the following situation (Misdariis et al, 2013): a pedestrian located on the sidewalk of a street waits before crossing. An EV may pass by, coming either from the right or from the left.…”

Section: Scenariomentioning

confidence: 99%

“…To obtain a pseudo-realistic passing-by scenario, the following properties have been implemented:  The sound level of the EV is modulated according to the vehicle/listener distance. The model used, based on acoustic theory, considers the EV as a monopole and provides a sound level inversely proportional to the distance to the listener (1/r) (see Figure 1) (Misdariis et al, 2013), (Lee et al, 2017),  The speed of the EV is considered as constant and equal to 20km/h,  The duration of the sound stimuli is 15 seconds,  The Doppler effect (shifting in frequency due to the speed of the source) is taken into account for a more realistic experience,  The direction of the car (from the right or from the left) is randomly chosen,  The panning of the EV sound is managed in such a way that the source goes progressively from one canal (left or right, depending of the direction of the EV) to the other (right or left) according to the position of the vehicle.…”

Section: Scenariomentioning

confidence: 99%

“…Because of this, some countries have started to create a legislation requiring EV to be equipped with a warning sound generation device, as well as specifications regarding the sound that should be emitted (Konet et al, 2011). Several studies have come up with recommendations regarding the nature of such sounds (Misdariis et al, 2013) (Robart et al, 2013) (Poveda-Martinez et al, 2017). These recommendations must also take into account potential noise pollution that could negatively affect the experience of pedestrians, cyclists and other drivers (Petiot et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Extracting Design Recommendations From Interactive Genetic Algorithm Experiments: Application to the Design of Sounds for Electric Vehicles

et al. 2021

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The integration of users' perception in the design process is and important challenge for the optimization of products. This study describes how design recommendations can be drawn, from a perceptual experiment with a panel of subjects using a multi-objective interactive genetic algorithm (IGA). The application concerns the bi-objective optimization of the unpleasantness and the detectability of sounds for electric vehicles (EV). After a description of the experimental protocol for the assessment of the detectability and the unpleasantness of EV sounds (listening test), a set of optimal sounds (Pareto efficient) is defined with an IGA experiment. The analysis of these sounds, based on a probabilistic analysis of the selection process, leads to the definition of design recommendations. A second listening test, involving recommended sounds but also other design proposals, allows an evaluation of the validity of the approach. Results show that the sounds recommended obtain interesting performance, in particular to improve the detectability of EV sounds.

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