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| Author(s): |
Jaime Alberto Mosquera Sánchez
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) |
| Defense date: | 2012-08-09 |
| Examining board members: |
Leopoldo Pisanelli Rodrigues de Oliveira;
José Roberto de França Arruda;
Paulo Sergio Varoto
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| Advisor: | Leopoldo Pisanelli Rodrigues de Oliveira |
| Abstract | |
This master thesis deals with the study of active noise and sound quality control systems in automotive applications, and the innovative assessment of their performance based on relevant psychoacoustic metrics in this area such as Loudness, Roughness and Tonality. A methodology for designing and implementing active control systems based on psychoacoustic metrics is established. The main challenges reside in defining the set of time-frequency attributes of the disturbance, responsible for the undesirable auditory stimuli. Computer algorithms are used extensively for simulating and analyzing the disturbance, which is a synthesized internal combustion engine noise, integrating both the control system design and psychoacoustics areas. An adaptive active sound quality control algorithm is proposed to resolve the amplitude and/or relative phase interactions among the narrowband components of the multi-harmonic disturbance. Eventually, the numerical results are correlated with real experiments, allowing not only a critical analysis of the psychoacoustic performance of the controllers, but also of the proposed design methodology, which is accomplished with the aid of a vehicle\'s mock-up, subject to disturbances of relevant psychoacoustic characteristics to the proposed problem. (AU) | |
| FAPESP's process: | 10/03556-1 - Active Structural Acoustic Control: Design, Simulation and Sound Quality Analysis |
| Grantee: | Jaime Alberto Mosquera Sánchez |
| Support Opportunities: | Scholarships in Brazil - Master |