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Wyszukujesz frazę "amplitude-frequency relation" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Perceptually Correlated Parameters of Musical Instrument Tones
Autorzy:
Beauchamp, J. W.
Powiązania:
https://bibliotekanauki.pl/articles/177352.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
musical timbre
music synthesis
loudness
pitch
duration
attack
decay
spectral envelope
spectral centroid
spectral irregularity
spectral flux
vibrato
inharmonicity
discrimination
dissimilarity relation
multidimensional scaling (MDS)
timbre transposition
rms amplitude
fundamental frequency
correspondence
Opis:
In Western music culture instruments have been developed according to unique instrument acoustical features based on types of excitation, resonance, and radiation. These include the woodwind, brass, bowed and plucked string, and percussion families of instruments. On the other hand, instrument performance depends on musical training, and music listening depends on perception of instrument output. Since musical signals are easier to understand in the frequency domain than the time domain, much effort has been made to perform spectral analysis and extract salient parameters, such as spectral centroids, in order to create simplified synthesis models for musical instrument sound synthesis. Moreover, perceptual tests have been made to determine the relative importance of various parameters, such as spectral centroid variation, spectral incoherence, and spectral irregularity. It turns out that the importance of particular parameters depends on both their strengths within musical sounds as well as the robustness of their effect on perception. Methods that the author and his colleagues have used to explore timbre perception are: 1) discrimination of parameter reduction or elimination; 2) dissimilarity judgments together with multidimensional scaling; 3) informal listening to sound morphing examples. This paper discusses ramifications of this work for sound synthesis and timbre transposition.
Źródło:
Archives of Acoustics; 2011, 36, 2; 225-238
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-linear vibrations of a non-uniform beam with symmetrically located piezoelectric patches
Autorzy:
Kuliński, K.
Przybylski, J.
Powiązania:
https://bibliotekanauki.pl/articles/128218.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
non-linear vibrations
piezoactuator
amplitude-frequency relation
Winkler foundation
drgania nieliniowe
piezoaktuator
podłoże Winklera
Opis:
In this paper the non-linear vibration behaviour and its modification due to the piezoelectric actuation of a beam with varying cross section and resting on an elastic foundation has been discussed. Due to assumed end conditions the stretching force emerges during the system vibrations. That force can be modified by an axial residual force to enhance or reduce the value of vibrations frequency of the beam. The system is divided onto three segments with the central segment consisted of the core beam and two colocally and perfectly bonded piezo patches. In order to obtain the approximate solutions of the non-linear frequency of the systems the Lindstedt-Poincare method has been utilized. Vast number of numerical results shows that not only the structural parameters of the system have significant effect on its non-linear vibration behaviour at a given amplitude but also the residual force and the elastic foundation modulus.
Źródło:
Vibrations in Physical Systems; 2016, 27; 203-210
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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