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首页> 外文会议>The automobile in the second decade: sharing all energy solutions >DEVELOPMENT OF A PREDICTION MODEL OF ACOUSTIC DISCOMFORT IN CARS FOR ENGINE IDLE SOUNDS
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DEVELOPMENT OF A PREDICTION MODEL OF ACOUSTIC DISCOMFORT IN CARS FOR ENGINE IDLE SOUNDS

机译：发动机怠速声音汽车声不适预测模型的建立

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摘要

Sound quality can be described as the relation between the perceptual reactions that reflect therncustomer’s acceptance of a product that generates sound. Initially, A-weighted sound levelrnwas the only parameter used in the acoustic assessment. Since the 1950s, psychoacousticrninvestigations have contributed to enhance the correlation between hearing sensations andrnobjective parameters that define the sound. Nowadays, the application of sound quality inrnproduct design is widely extended in the industry, being considered an important field studyrnby the main automobile manufacturers. This aspect has become as important as otherrnspecifications that define the vehicle (design, equipment, colour, price...). Therefore, soundrnquality would be considered as a distinguishing factor that could contribute to the carrnpurchase decision.rnThis paper describes the development of a methodology to obtain a predicted model ofrnacoustic annoyance applied to sounds of engines running on idle of compact cars, a featurernthat the customer can test in the car dealership in the process of purchase. Firstly, binauralrnrecordings of eight car engines have been carried out by means of a digital artificial headrnplaced on the seat of the driver. Main psychoacoustic parameters (level, loudness, sharpness,rnroughness...) were calculated. Afterwards, the design of a jury test was set up taking intornaccount the kind of sounds to be evaluated. The recordings were presented to 12 subjects tornassess the real sounds in a rate scale depending on the discomfort level perceived. The juryrntest was carried out in a laboratory where each subject listened to the recordings by means ofrnheadphones connected to an equalizer, making possible the reproduction of the sounds in anrnaccurate binaural way and providing listeners with a realistic acoustic experience as if theyrnwere inside the vehicle. Finally, a model was established to predict the comfort rate for eachrnsound using the psychoacoustic parameters as predictors.rnThis procedure can be useful for designers to validate the prototype until the acousticrnsatisfaction level is met and to assess a specific model with respect to the rest of existingrnproducts in the market.
机译：声音质量可以描述为反映客户对产生声音的产品的接受程度的感知反应之间的关系。最初，A加权声级是声学评估中使用的唯一参数。自1950年代以来，心理声学研究为增强听力和定义声音的客观参数之间的相关性做出了贡献。如今，声音质量产品设计的应用已在业界广泛扩展，被主要的汽车制造商视为重要的领域研究。这方面与定义车辆的其他规格（设计，设备，颜色，价格...）一样重要。因此，声音质量将被认为是有助于做出购买决定的一个区别因素。本文描述了一种方法的开发，该方法用于获取预测的声学烦恼模型，该模型适用于在紧凑型汽车空转时运转的发动机的声音，这是客户可以做到的。在购车过程中测试汽车经销商。首先，已经通过放置在驾驶员座位上的数字人工头枕进行了八台汽车发动机的双耳记录。计算了主要的心理声学参数（水平，响度，清晰度，粗糙度）。此后，考虑到要评估的声音种类，进行了陪审团测试的设计。记录被呈现给12位受试者，根据感觉到的不适程度，以比例尺评估真实声音。陪审团是在实验室中进行的，每个对象都通过连接到均衡器的耳机收听录音，从而可以以不准确的双耳方式再现声音，并为听众提供逼真的声学体验，就好像它们在车内一样。最后，建立了一个模型，以心理声学参数作为预测因子来预测每个声音的舒适度.rn此过程对于设计师验证原型直到满足声学满意水平以及评估现有产品的其余部分的特定模型都是有用的在市场上。

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