Sound Quality Design as an Issue of Interactive Context

Author(s):  
Brigitte Schulte-Fortkamp

When sound quality has to be evaluated a number of difficulties arise. Although there are various attempts of evaluating it, there is no definitive approach which covers the diverse requirements with respect to subjective importance. Since the subjective evaluation will be influenced by different modifiers, the methods in question have to be adapted necessarily to the various objectives that are related to certain subjective as well as to physical, psycho-acoustic, and socio-acoustic variables. The evaluation of the perception of acoustic environments needs an interactive, integrating, transdisciplinary concept. What will to be discussed up front are contextual interdependencies, socio-acoustic, and psychological methods, the significance of the modifiers within the guided decision-making process as well as the importance of sensorial modifiers as they make up the foundation of the research process. In many studies focusing on sound quality the observation of context in general becomes an issue if the experimental setup or the instruction or even the respective stages of the experiment are regarded as contextual, i.e. sound evaluation or the evaluation of product-related sound quality always implies evaluation of lifestyles depending upon acceptance and therefore intimately related to the daily routine of the tested individual. evaluations of sounds are highly sensitive contextually, but at present there is no usage-oriented experimental instruction which sufficiently defines the contextual rapport within a given sound evaluation setup. the concept of sound quality evaluation needs to be broadened to integrate a subjective and psycho-social approach. a concept and procedure will be introduced for benchmarking and target sound development in context to appropriately evaluate the sound of the corporate identity introduction

1992 ◽  
Vol 36 (5) ◽  
pp. 475-479 ◽  
Author(s):  
Norman C. Otto ◽  
Gregory H. Wakefield

The sensory environment of the vehicle is an area where customer expectations have greatly increased in recent years. For example, sound quality has become a very important factor in determining customer perception of vehicle quality and value. In this paper, a method for evaluating sound quality is presented and used in an engine design application. As part of the design of a future midsize vehicle, 14 engine component modifications were being considered as ways to improve sound quality. A subjective evaluation was carried out to determine if these modifications had any effect on perceived sound quality and, if so, which modifications provided the greatest sound quality benefit. A paired comparison method was used in which subjects judged, first, similarity and, then, preference. The similarity results showed that the vehicle sounds were indeed perceived quite differently. Additional analysis, using multidimensional scaling, revealed that most of these differences could be attributed to just three of the modifications (lightweight valvetrain, crankshaft counterweight, and accessory drive). The preference results confirmed that these three components also governed the valuative judgements. As a result of this study, these modified components were included in the final vehicle design. More generally, the subjective evaluation and analysis procedure described here offers a means for bringing human factors into the design of automotive acoustic environments.


2021 ◽  
Vol 263 (2) ◽  
pp. 4526-4531
Author(s):  
Kun Qian ◽  
Zhichao Hou ◽  
Ruixue Liu ◽  
Dengke Sun ◽  
Rongkang Luo

With the increasing demand of users for the acoustical comfort of commercial vehicles, the sound quality has become one of the important indicators of comfort evaluation. The research focuses on the objective evaluation method of the subjective perception of the sound quality in commercial vehicle. The interior noises of commercial vehicle with an inline six diesel engine are measured. The five psychoacoustic parameters (loudness, roughness, sharpness, fluctuation strength, tonality and articulation index) are applied to the evaluation and analysis of the interior noises of the commercial vehicle. Using psychoacoustic parameters to evaluate the noises in commercial vehicle, it is of great significance for the analysis and control of the noises in commercial vehicle. The research results provide a theoretical basis for guiding the sound quality design and development of commercial vehicles.


2021 ◽  
Vol 263 (2) ◽  
pp. 4189-4198
Author(s):  
Katsuya Yamauchi ◽  
Minori Dan ◽  
Federico Cioffi ◽  
Luigi Maffei ◽  
Massimiliano Masullo

The heating, ventilation and air-conditioning (HVAC) system is one of the most critical sources in in-vehicle noise environment, especially when cars are moving at low speed or at lower engine rotation. With the transition to electric vehicles (EV) from internal combustion engine vehicles (ICEV), the contribution of powertrain becomes lower on the background noise inside car cabins. The authors have been conducting a collaborative research on HVAC sound quality inside car cabins. In this paper the results of a subjective evaluation of HVAC sound quality were presented, that attempted to compare the perceptual differences among the two groups, i.e. EVs and ICEVs. The result revealed the difference in the noise perception among the two types of vehicles especially softer air flow rate conditions.


Author(s):  
Emma Arvidsson ◽  
Erling Nilsson ◽  
Delphine Bard-Hagberg ◽  
Ola J. I. Karlsson

In environments such as classrooms and offices, complex tasks are performed. A satisfactory acoustic environment is critical for the performance of such tasks. To ensure a good acoustic environment, the right acoustic treatment must be used. The relation between different room acoustic treatments and how they affect speech perception in these types of rooms is not yet fully understood. In this study, speech perception was evaluated for three different configurations using absorbers and diffusers. Twenty-nine participants reported on their subjective experience of speech in respect of different configurations in different positions in a room. They judged sound quality and attributes related to speech perception. In addition, the jury members ranked the different acoustic environments. The subjective experience was related to the different room acoustic treatments and the room acoustic parameters of speech clarity, reverberation time and sound strength. It was found that people, on average, rated treatments with a high degree of absorption as best. This configuration had the highest speech clarity value and lowest values for reverberation time and sound strength. The perceived sound quality could be correlated to speech clarity, while attributes related to speech perception had the strongest association with reverberation time.


2013 ◽  
Vol 455 ◽  
pp. 193-197 ◽  
Author(s):  
Ting Zhuang ◽  
Yan Yan Zuo

This experiment collected sound signals of four different cars driving at different speeds on highway and replayed the noise samples with playback software HEAD Audio Recorder. The subjective evaluation tests were carried out with paired comparison method. Evaluating models between subjective evaluation and objective psychoacoustic parameters were established with SPSS analysis software.


2011 ◽  
Vol 2011.49 (0) ◽  
pp. 21-22
Author(s):  
Toshihiro MATSUZAWA ◽  
Kenji ASANO ◽  
Yoshio INOUE ◽  
Toshinori SENGOKU ◽  
Kyoko SHIBATA
Keyword(s):  

2006 ◽  
Vol 2006 (0) ◽  
pp. _637-1_-_637-5_
Author(s):  
Hisami OHISHI ◽  
Kosuke TSUNODA ◽  
Hiroshi SAEGUSA ◽  
Kazunori ONO

2013 ◽  
Vol 716 ◽  
pp. 674-679 ◽  
Author(s):  
Yan Yan Zuo ◽  
Shuai Li Zhou ◽  
Wen Feng Zhou

The interior noise samples from four cars at different positions and different speeds were selected as the evaluation objects. The subjective evaluation test of sound quality preference was carried out with paired comparison method. Several objective psycho-acoustical parameters of these samples were calculated. By way of linear correlation and multi-dimensional regression analysis, an equation between the subjective evaluation of noise preference and the objective psycho-acoustical parameters was established. The results indicate that the vehicle interior sound quality preference under the good highway and the constant-velocity driving conditions is affected mainly by two psycho-acoustical parameters Loudness and Sharpness.


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