Results 191 to 200 of about 560,528 (243)
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Separation of harmonic sounds using linear models for the overtone series
IEEE International Conference on Acoustics Speech and Signal Processing, 2002A signal processing method is described, which separates harmonic sounds by applying linear models for the overtone series of sounds. Time-varying sinusoidal parameters are estimated in an iterative algorithm which is initialized using a multipitch estimator that finds the number of concurrent sounds and their frequency components.
Tuomas Virtanen, Anssi Klapuri
exaly +4 more sources
2012 IEEE International Ultrasonics Symposium, 2012
Ultra high frequency resonators have higher noise levels due to their greater miniaturization and higher power density. This paper proposes a new method using nonlinear acoustic coupling for improving the resonator Q and hence reducing noise levels in third overtone thickness shear resonators.
Yook-Kong Yong
exaly +3 more sources
Ultra high frequency resonators have higher noise levels due to their greater miniaturization and higher power density. This paper proposes a new method using nonlinear acoustic coupling for improving the resonator Q and hence reducing noise levels in third overtone thickness shear resonators.
Yook-Kong Yong
exaly +3 more sources
Chemical Physics, 1982
Abstract Inelastic neutron scattering spectra of MFHF (M Na and K) have been measured up to energy transfers of ca. 4000 cm−1 Both 0 → 1 and 0 → 2 transitions of the bending (v2), and antisymmetric stretching (v3) modes were observed. A normal harmonic (i.e.
John Tomkinson +2 more
exaly +3 more sources
Abstract Inelastic neutron scattering spectra of MFHF (M Na and K) have been measured up to energy transfers of ca. 4000 cm−1 Both 0 → 1 and 0 → 2 transitions of the bending (v2), and antisymmetric stretching (v3) modes were observed. A normal harmonic (i.e.
John Tomkinson +2 more
exaly +3 more sources
Suppression of lower harmonic responses on overtone AT-cut quartz crystal resonators
Electronics and Communications in Japan, Part III: Fundamental Electronic Science (English Translation of Denshi Tsushin Gakkai Ronbunshi), 2000K. Hirama, T. Shoji, Yoshiaki Tanaka
exaly +3 more sources
The Journal of the Acoustical Society of America, 2023
Flageolet harmonics is a playing technique, in which a player lightly touches a nodal point on a string with their finger. Previous studies have reported that the harmonic sound sustains for a short time after the finger is removed from the string while ...
Shodai Tanaka, Hiroshi Kori, Ayumi Ozawa
semanticscholar +2 more sources
Flageolet harmonics is a playing technique, in which a player lightly touches a nodal point on a string with their finger. Previous studies have reported that the harmonic sound sustains for a short time after the finger is removed from the string while ...
Shodai Tanaka, Hiroshi Kori, Ayumi Ozawa
semanticscholar +2 more sources
1993 Proceedings IEEE Ultrasonics Symposium, 1993
Finite element matrix equations, derived from two-dimensional piezoelectric high frequency plate theory are solved to study the vibrational behavior of the third overtone of thickness shear in square and circular SC-cut quartz resonators. The mass-loading and electric effects of electrodes are included.
Y. Yong, Zhen Zhang
semanticscholar +3 more sources
Finite element matrix equations, derived from two-dimensional piezoelectric high frequency plate theory are solved to study the vibrational behavior of the third overtone of thickness shear in square and circular SC-cut quartz resonators. The mass-loading and electric effects of electrodes are included.
Y. Yong, Zhen Zhang
semanticscholar +3 more sources
The overtone structure of acoustic fluctuations due to harmonic variations in sound speed.
The Journal of the Acoustical Society of America, 2005Explicit relations are derived between the acoustic pressure and a sound speed that is periodic. They are derived for the Pekeris waveguide, and extended to the range and depth-dependent adiabatic mode/WKB case. As expected, acoustic pressure is found to fluctuate at the sound speed fundamental and its overtones.
R. Field, J. George
semanticscholar +3 more sources
2018 IEEE International Ultrasonics Symposium (IUS), 2018
Previous papers and experiments have well documented the drive level dependency in a single mode. The parameters governing drive level dependency in quartz resonators however are still not well understood. We show in this paper the nonlinear interactions
Y. Yong, X. Pang, Ji Wang
semanticscholar +2 more sources
Previous papers and experiments have well documented the drive level dependency in a single mode. The parameters governing drive level dependency in quartz resonators however are still not well understood. We show in this paper the nonlinear interactions
Y. Yong, X. Pang, Ji Wang
semanticscholar +2 more sources
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 2020
Infrared overtone spectra of the ν(C = O) stretching vibration (ν1) of gaseous hexafluoroacetone ((CF3)2C = O, HFA) were recorded in the spectral range of 7450-3300 cm-1 with a resolution of 0.1 cm-1.
Ivan Gainullin +2 more
exaly +2 more sources
Infrared overtone spectra of the ν(C = O) stretching vibration (ν1) of gaseous hexafluoroacetone ((CF3)2C = O, HFA) were recorded in the spectral range of 7450-3300 cm-1 with a resolution of 0.1 cm-1.
Ivan Gainullin +2 more
exaly +2 more sources
Separation of harmonic sounds using multipitch analysis and linear models for the overtone series
The Journal of the Acoustical Society of America, 2002A signal processing method for the separation of concurrent harmonic sounds is described. The method is based on a two-stage approach. First, a multiple fundamental frequency estimator is applied to find initial sound parameters which are reliable, but inaccurate and static.
Tuomas Virtanen, Anssi Klapuri
semanticscholar +2 more sources