On the Fifth International Congress, INQUA (1957)
نویسندگان
چکیده
منابع مشابه
Fifth 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.
متن کاملFifth International Congress on Sound and Vibration
Nowadays the joint time-frequency analysis and wavelet techniques have stepped out from the academic research sites and spread out to several industrial applications. The static nature of the conventional spectral techniques used in the analysis of vibrating structures means considerable limitation in certain type of systems and problems arisen on them. Fast changes in the vibrating structures ...
متن کاملFifth International Congress on Sound and Vibration
This paper presents a new scheme for active noise control (ANC) in ducts. It uses three pressure sensors to measure and separate the far field wave components in a duct. These are the incident wave from the primary noise source, the reflection wave from the duct outlet, and the anti-sound wave generated by the loudspeaker. Use of traveling waves makes it easier to design ANC schemes since the t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Quaternary Research (Daiyonki-Kenkyu)
سال: 1959
ISSN: 1881-8129,0418-2642
DOI: 10.4116/jaqua.1.138