Showing papers on "Spectrogram published in 1977"
TL;DR: By re-assembling the extracted components, a cleaned-up low-entropy frequency-time picture of the signal is produced which shows more structure and which is much more amenable to automatic analysis than the original spectrogram.
7 citations
Journal Article•
01 Jan 1977-Agressologie: revue internationale de physio-biologie et de pharmacologie appliquées aux effets de l'agression
5 citations
TL;DR: Original two and multi-level sound spectrograms have been produced and linguistic interpretations have been deduced and suggestion of a likely ‘form factor’ in locutors made.
Abstract: In order to extract significant sound information to determine certain voice parameters in locutors speaking a foreign language, original two and multi-level sound spectrograms have been produced Optical methods using Fourier techniques have been developed to infer a degree of resemblance from correlations of optical pupils representing whole sequences Linguistic interpretations have been deduced and suggestion of a likely ‘form factor’ in locutors made
2 citations
TL;DR: A spectral classification system is a morphological device for arranging in order a finite series of observations of individual objects as discussed by the authors, which is in principle arbitrary; one could think for instance of an order based on richness of lines, or on the presence of hydrogen lines, etc.
Abstract: A spectral classification system is a morphological device for arranging in order a finite series of observations of individual objects. One has thus three elements: an “order”, i.e. an abstract discontinuous scheme, a series of objects and a certain type of observation (spectrogram) that is performed on all objects of the sample. The “order” is in principle arbitrary; one could think for instance of an order based on richness of lines, or on the presence of hydrogen lines, etc. However such an idealization is clearly simplistic, because it would imply that the classifier is completely unaware of theory — but he is not, if for no other reason than simply that he would never get his PhD. Thus one should add the constraint that the scheme one adopts be physically sound.
2 citations
TL;DR: A new method used for analysis of infrasound signals recorded on paper in the as a function of time is presented and some spectrograms processed by computer are presented.
Abstract: A new method used for analysis of infrasound signals recorded on paper in the as a function of time is presented. The principle and technique of this method are described, and some spectrograms processed by computer are presented. The DGC-FORTRAN-IV program used for this method is also given.
1 citations
TL;DR: In this paper, a spectrogram of the 5250 A region previously obtained during a period of excellent seeing has been remeasured and calibrated by reference to the preliminary KPNO photometric atlas.
Abstract: A spectrogram of the 5250 A region previously obtained during a period of excellent seeing has been remeasured and calibrated by reference to the preliminary KPNO photometric atlas. This analysis, using the logarithm of opacitance instead of an H-D plot, has reduced some of the effects of scattered light and shows greater facular line contrast.
1 citations
TL;DR: A manual technique for rapidly and accurately scoring sound spectrograms allows for objective phonetic description and evaluation without the aid of either a highly-trained scorer or complex processing equipment.
Abstract: A manual technique for rapidly and accurately scoring sound spectrograms is presented. The method allows for objective phonetic description and evaluation without the aid of either a highly-trained scorer or complex processing equipment. Empirical evidence using the technique is presented.