Combining subjective and objective assessments to improve acoustic comfort evaluation of motor cars
Combining subjective and objective assessments to improve acoustic comfort evaluation of motor cars
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DOI：
10.1016/j.apacoust.2012.03.013
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发表时间：
2012-09-01
影响因子：
3.4
通讯作者：
Medeiros, Eduardo Bauzer
中科院分区：
文献类型：
--
作者：
da Silveira Brizon, Carla Julio;Medeiros, Eduardo Bauzer
介绍了一种建立汽车声学舒适性指标的研究。五个新的轻型到中型舱口汽车的不同使已经测试了两种不同的条件：公共道路，和限制测试道路。还使用滚动测力计在声室内进行了额外的测试。公共道路的程序，其中涉及三种不同的道路条件，即：高速公路，市中心道路和小砾石覆盖的道路进行了主观（陪审团）和客观的仪器测量。在限制电路中的测试仅涉及两种道路条件的客观测量，即粗糙的沥青和光滑的沥青表面，其中进行了速度和加速度的标准测试。测试人员由经验丰富的驾驶员组成，所有人都有一定的汽车工程经验，其余的是NVH专家。他们被要求对每辆车进行排名，并提供一个简短的技术描述，说明他们在测试过程中能听到什么。然后将结果与测量结果进行比较，并使用统计学进行处理，以建立一系列舒适性指标，这些指标已针对每个测试条件进行开发和呈现。这个想法不仅是为了建立一个舒适指数方程，而且主要是为了提供一个通常是昂贵和耗时的程序的替代方案。结果表明，只要控制好试验条件，在封闭试验道路上进行标准试验是能够提高舒适性指标的。然而，仍然需要进一步的测试来改善这些条件，以便将结果的质量与以更常见的方式获得的结果进行比较。(C)2012爱思唯尔有限公司保留所有权利。
A study leading to the establishment of the acoustic comfort index in motor cars is described. Five new light to medium hatch cars of different makes have been tested for two different conditions: public roads, and restricted test roads. Additional tests have also been carried inside an acoustic chamber using a roll dynamometer. Both subjective (jury) and objective with instrumental measurement have been carried out for the public road procedure, which involved three different road conditions, namely: high-speed highways, city centre roads and small gravel covered roads. Testing in the restricted circuit only involved objective measurements for two road conditions which were rough asphalt and smooth asphalt surfaces, where standard tests of speed and acceleration have been carried out. The universe of testers was composed of experienced drivers, all having some kind of experience in car engineering the remainder being NVH experts. They were asked to rank each car and provide a brief technical description of what they could hear during the test. The results were then compared with the measurements and treated using Statistics, in order to establish a series of comfort indexes, which have been developed and presented for each test condition. The idea was not only to establish a comfort index equation, but also mainly to provide alternatives to what is usually an expensive and time consuming procedure. It has been found that standard testing in closed test roads is able to characterise the comfort index, provided that the test conditions are well controlled. However further testing is still needed to improve these conditions so that the quality of results is compared with those obtained in the more usual way. (C) 2012 Elsevier Ltd. All rights reserved.