منابع مشابه
International Congress on Sound and Vibration
A review of the current state of parametric loudspeaker from the aspects of modelling, measurement, signal processing, implementation and applications is presented in this paper. A variety of well-established and emerging numerical methods to predict the propagation of finite amplitude sound beams are discussed and compared. The accurate measurement of the difference-frequency sound is another ...
متن کاملSixth International Congress on Sound and Vibration
This work is concerned with the performance of adaptive filters with both poles and zeros in active noise control (ANC) applications. This filtered-error type of applications makes it necessary to modify classical adaptive algorithms to cancel the noise. Thus, a well established theory exists for filtered-error adaptive FIR filters, with a special mention for the FxLMS algorithm. However, when ...
متن کاملFifth International Congress on Sound and Vibration
A frequency domain filtered-x type least mean active sound intensity adaptive control algorithm based on waveform synthesis is developed for active control of transformer noise. The algorithm is useful for providing global control of transformer noise by minirnising the mean active sound intensities for the fundamental frequency and its harmonics in the near acoustic field of the transformer. M...
متن کاملFifth International Congress on Sound and Vibration
This paper analyzes the chaotic characteristics of irregular systems using both wave theory and ray theory. In ray theory, we visualize the chaotic properties of the ray propagation trajectories in a chaotic wave field. We found that the trajectory of the billiard problem with a stadium boundary condition has the same sensitivities to the initial conditions as does the mapping process on a logi...
متن کاملFifth International Congress on Sound and Vibration
The evolution of active systems applied to the reduction of aircraft cabin noise is studied. The main objective is to establish whether there are any significant lessons relative to the general use and commercialization of active noise and vibration systems.
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ژورنال
عنوان ژورنال: PROMET - Traffic&Transportation
سال: 2019
ISSN: 1848-4069,0353-5320
DOI: 10.7307/ptt.v31i1.3194