Sound quality analysis of slide adjuster for automotive power seat using stepwise regression

The production of good sound generation in the violin is a complex task that requires coordination and spatiotemporal control of bowing gestures. The use of motion-capture technologies to improve performance or reduce injury risks in the area of kinesiology is becoming widespread. The combination of motion accuracy and sound quality feedback has the potential of becoming an important aid in violin learning. In this study, we evaluate motion-capture and sound-quality analysis technologies developed inside the context of the TELMI, a technology-enhanced music learning project. We analyzed the sound and bow motion of 50 participants with no prior violin experience while learning to produce a stable sound in the violin. Participants were divided into two groups: the experimental group (N = 24) received real-time visual feedback both on kinematics and sound quality, while participants in the control group (N = 26) practiced without any type of external help. An additional third group of violin experts performed the same task for comparative purposes (N = 15). After the practice session, all groups were evaluated in a transfer phase without feedback. At the practice phase, the experimental group improved their bowing kinematics in comparison to the control group, but this was at the expense of impairing the sound quality of their performance. At the retention phase, the experimental group showed better results in sound quality, especially concerning control of sound dynamics. Besides, we found that the expert group improved the stability of their sound while using the technology. All in all, these results emphasize the importance of feedback technologies in learning complex tasks, such as musical instrument learning.

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Sound quality analysis of far-field noise from a high-performance military aircraft

The Journal of the Acoustical Society of America ◽

10.1121/1.5014183 ◽

2017 ◽

Vol 142 (4) ◽

pp. 2514-2514

Author(s):

S. Hales Swift ◽

Kent L. Gee ◽

Tracianne B. Neilsen ◽

Alan T. Wall ◽

Micah Downing ◽

...

Keyword(s):

High Performance ◽

Sound Quality ◽

Quality Analysis ◽

Far Field ◽

Military Aircraft ◽

Field Noise

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A New Method of Sound Quality Analysis Based on Design of Experiment

International Journal of Pattern Recognition and Artificial Intelligence ◽

10.1142/s0218001416580015 ◽

2016 ◽

Vol 30 (05) ◽

pp. 1658001

Author(s):

Gangping Tan ◽

Gang Jie ◽

Ming Cao

Keyword(s):

Active Noise Control ◽

Objective Evaluation ◽

Sound Quality ◽

Interior Noise ◽

Quality Analysis ◽

Optimum Level ◽

Optimization Strategy ◽

Vehicle Interior ◽

Band Noise ◽

Vehicle Interior Noise

An optimization strategy of sound quality was proposed to improve sound quality inside a vehicle. The frequency of vehicle interior noise was divided into sub-bands by equivalent rectangular bandwidth (ERB) in the frequency domain, and the intensity of sub-band noise located in the mid-low frequency can be modified by using the measure of active noise control (ANC) in order to analyze its influence on the sound quality of original noise. Orthogonal experiments of vehicle interior noise were conducted according to experimental design. A model of sound quality objective evaluation (SQOE) was proposed as an experimental index. The role of sub-band on the model of SQOE was analyzed at different speeds so as to achieve the optimum level, optimum combination of sound quality and main factors. The results, obtained by implementing the optimization strategy of sound quality, were verified by means of tests. By validation, it showed that optimum sound quality can be achieved by changing the intensity of sub-band noise.

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