Retinal Vibrations in Bacteriorhodopsin are Mechanically Harmonic but Electrically Anharmonic: Evidence From Overtone and Combination Bands [PDF]
Frontiers in Molecular Biosciences, 2021 Fundamental vibrations of the chromophore in the membrane protein bacteriorhodopsin (BR), a protonated Schiff base retinal, have been studied for decades, both by resonance Raman and by infrared (IR) difference spectroscopy.
Victor A. Lorenz-Fonfria +4 more
doaj +6 more sources
Harmonic vowels and neural dynamics: MEG evidence for auditory resonance integration in singing [PDF]
Frontiers in NeuroscienceIntroductionAuditory perception of sung syllables involves rapid shifts between speech-like interpretation and spectral awareness of resonance. Perceiving vocal tract resonances as pitch-like elements may be crucial for singers, linking this concept to ...
Wolfgang Saus +6 more
doaj +3 more sources
Initialization-robust multipitch estimation based on latent harmonic allocation using overtone corpus [PDF]
2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2012 We present a new method for modeling the overtone structures of musical instruments that uses an overtone corpus generated using a MIDI synthesizer. Since multipitch estimation requires a joint estimation of F0's and their overtone structures, one of the most important problems is the overtone structure modeling.
Tetsuya Ogata, Hiroshi G Okuno
exaly +3 more sources
On the Ratio of Periods of the Fundamental Harmonic and First Overtone of Magnetic Tube Kink Oscillations [PDF]
Solar Physics, 2016 We study kink oscillations of thin magnetic tubes. We assume that the density inside and outside the tube (and possibly also the cross-section radius) can vary along the tube. This variation is assumed to be of such a form that the kink speed is symmetric with respect to the tube centre and varies monotonically from the tube ends to the tube centre ...
M. S. Ruderman +3 more
semanticscholar +4 more sources
Spectroscopic Exploration of Squaraine Dyes: Molecular Characterization of Fundamental, Combination, and Overtone Bands. [PDF]
ACS Phys Chem AuA comprehensive vibrational analysis of squaraine dyes, a relevant class of molecules for dye-sensitized solar cell devices, is presented here. Exploiting density functional theory (DFT) in conjunction with second-order vibrational perturbation theory ...
Buttarazzi E +3 more
europepmc +2 more sources
Journal of Information Processing, 2013 We present a Bayesian analysis method that estimates the harmonic structure of musical instruments in music signals on the basis of psychoacoustic evidence. Since the main objective of multipitch analysis is joint estimation of the fundamental frequencies and their harmonic structures, the performance of harmonic structure estimation significantly ...
Daichi Sakaue +3 more
semanticscholar +3 more sources
TE Harmonic Overtone Mode Energy-Trapped Ceramic Filter with Narrow Frequency Tolerance
Japanese Journal of Applied Physics, 1997 Experimental studies have been made on the suppression of two major spurious responses, i.e., inharmonic overtones and the 6th thickness-shear-mode harmonic overtone, to realize a 3rd overtone thickness-extension double-mode bandpass filter using PbTiO3 ceramic substrates.
Y. Yamashita +2 more
semanticscholar +2 more sources
Vibration overtone hyperpolarizability measured for H2
Journal of Chemical Physics, 2020 The second hyperpolarizability (γ) of the H2 molecule was measured by gas-phase electric field induced second harmonic generation at the frequencies of the one-photon resonance for the 3-0 Q(J) overtone transitions (v, J = 0, J → 3, J for J = 0, 1, 2 ...
David Shelton +2 more
exaly +2 more sources
Black-Box Simulations of Anharmonic Vibrational Chiroptical Spectra: Problems with Property Third Derivatives and the Solvent. [PDF]
J Chem Theory ComputChiroptical methods, including vibrational circular dichroism (VCD) and Raman optical activity (ROA), reveal details about molecular structure. For three model molecules, α-pinene, camphor, and fenchone, we show that increased sensitivity of modern ...
Yang Q +6 more
europepmc +2 more sources
Diode Laser Overtone Spectroscopy of Methyl Iodide at 850 nm [PDF]
Spectroscopy Journal, 2023 Using Tunable Diode Laser Absorption Spectroscopy (TDLAS), 82 CH3I overtone absorption lines were detected for the first time in the range between 11,660 and 11,840 cm−1 (844–857 nm), with strengths estimated around 10−27–10−26 cm/molecule.
A. Lucchesini
semanticscholar +1 more source