It has been known for a long time in the automobile industry that the first contact between the customer and a car in the showroom consists of opening the door, sitting in the car and closing the door. Therefore, the sounds of the door opening and closing are carefully designed to invoke feelings of high quality and safety in the customer. Of course, the vehicle’s operating noises are equally c...

A major part of the signal distortion generated by loudspeaker systems are directly related with the geometry and properties of the material used in loudspeaker design and found in all good units passing the assembling line. Those regular distortions are the result of an optimisation process giving the best compromise between perceived sound quality, maximal output, cost, weight and size. This ...

Driver and passenger comfort is a major factor in the automotive industry and one important part of comfort in a vehicle represents sound quality. Sound quality can play an important role in the customer’s vehicle selection [1-3]. Furthermore, today, customers ask for more acoustical comfort and pleasant sounds [4,5]. For this reason, the development of high-quality sounds becomes more and more...

AbstmctKnowledge present in multiple knowledge bases might need to be reviewed to make decisions based on the combined knowledge. We define the concept of combining knowledge present in a set of knowledge bases and present algorithms to maximally combine them SQ that the combination is consistent with respect to the integrity constraints associated with the knowledge bases. For this we define t...

The aim of this work is to use subjective evaluations of sounds produced by a piano synthesis model to determine the perceptual influence on phenomena involved in sound production. The specificity of musical sounds is that they are intended for perception and judgments by human beings. It is therefore necessary, in order to evaluate the acoustic qualities of a musical instrument or a sound mode...

defined by u% + MUQ+J = u^+2The latter is shown to be true in all cases but one, and in slightly revised form in the remaining case. Z A GENERAL ASYMPTOTIC THEOREM With the polynomial fix) = -ag-a-jX an.fx " +x = (x rj) -(x rn), a,integers, r-j real, /y distinct, |/y| < 1 for / > 2, we associate the /7-space C(f) of all (complex) sequences S =is0,sif—J in which SQ, —, sn-i are arbitrary, but ha...

Heat flow SQ of the First Law of Thermodynamics is expressed in terms of the entropy flow &Q/T) SQ = SIT(QIT)I = ~~(Q/~+(Q~~d~ where T&Q/T) denotes the energy equivalent of the entropy flow, and (Q/T)dT introduces the concept of lost heat into entropy production. Here Q = QK f Q R where superscripts K and R indicate conduction and radiation, respectively. In terms of the lost heat, dimensionles...

It has been proposed that the elimination of electronic-service quality (e-SQ) gaps holds the key to a better website experience when dealing with organizations on-line. In turn, this leads to increased perceived e-SQ, perceived value, and importantly purchases and repurchases. In this paper a method of measuring e-SQ gaps is proposed. Regression and coefficient analysis are used to analyse dat...

Noise pollution is one of the most important features of architectural spaces having a great impact on the comfort of residents. Therefore, providing appropriate and sustainable solutions for noise pollution control is essential. Today, with the use of man-made synthetic materials, it has been tried to improve the sound performance of buildings. The purpose of this study is to show the characte...

The aim of this paper is to study the audio quality offered by a simple Forward Error Correction (FEC) code used in audio applications like Freephone or Rat. This coding technique consists in adding to every audio packet a redundant information concerning a preceding audio packet which belongs to the same audio flow. We show that the audio quality depends not only on the number of FEC flows and...