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
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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
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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.
Daichi Sakaue +3 more
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Pure-tone birdsong by resonance filtering of harmonic overtones [PDF]
Proceedings of the National Academy of Sciences, 2003 Pure-tone song is a common and widespread phenomenon in birds. The mechanistic origin of this type of phonation has been the subject of long-standing discussion. Currently, there are three hypotheses. ( i ) A vibrating valve in the avian vocal organ, the syrinx, generates a multifrequency harmonic source sound ...
Beckers, G.J.L. +2 more
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Information generated by the moving pinnae of Rhinolophus rouxi: tuning of the morphology at different harmonics. [PDF]
PLoS ONE, 2011 Bats typically emit multi harmonic calls. Their head morphology shapes the emission and hearing sound fields as a function of frequency. Therefore, the sound fields are markedly different for the various harmonics.
Dieter Vanderelst +3 more
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Musical Drums with Harmonic Overtones [PDF]
Nature, 1920 IT is well known that percussion instruments as a class give inharmonic overtones, and are thus musically defective. We find on investigation that a special type of musical drum which has long been known and used in India forms a very remarkable exception to the foregoing rule, as it gives harmonic overtones having the same relation of pitch to the ...
C. V. RAMAN, SIVAKALI KUMAR
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Gambus Hadhramaut: The Malaysian Malay Lute Tuning Retrieval
BioResources, 2023 This study identified elements in a simple homemade gambus from a local crafter using a scientific approach. The gambus was made from geronggang wood (Cratoxylum arborescens), a light Malaysian hardwood with pink sapwood, distinct from the heartwood with
Sinin Hamdan +4 more
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Quasi-normal modes and microscopic description of 2D black holes
Journal of High Energy Physics, 2022 We investigate the possibility of using quasi-normal modes (QNMs) to probe the microscopic structure of two-dimensional (2D) anti-de Sitter (AdS2) dilatonic black holes.
M. Cadoni, M. Oi, A. P. Sanna
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Preservation of the harmonic overtones in the violin family beyond Stradivari
, 2022 Three hundred years ago, Antonio Stradivari enjoyed the golden period of the violin making in the human history. Luthiers and researchers endeavor to study his legendary legacy. Unfortunately, a consensus that the present progress has reached his level remains lacking.
Su, Li +6 more
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Post-noon two-minute period pulsating aurora and their relationship to the dayside convection pattern [PDF]
Annales Geophysicae, 1999 Poleward-moving auroral forms, as observed by meridian-scanning photometers, in the vicinity of the cusp region are generally assumed to be the optical signature of flux transfer events.
S. E. Milan +5 more
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