Journal ArticleDOI
Computer-based sound spectrograph system.
William J. Strong,E. Paul Palmer +1 more
TLDR
A particular computer‐based sound spectrograph is described in which digitized time waveforms stored on disk memory are spectrally analyzed and the resulting data stored back on disk for later display.Abstract:
Sound spectrographs based on digital computers are of interest because of the versatility they offer in generating and displaying sound spectrograms. A particular computer‐based sound spectrograph is described in which digitized time waveforms stored on disk memory are spectrally analyzed and the resulting data stored back on disk for later display. Analyses are also performed to obtain the voicing fundamental frequency and the overall‐intensity level of the signal which are displayed time registered with the spectrogram. While viewing the spectrographic display, the user is able to tailor the display before making hardcopy. This permits the user to specify a spectral threshold level, the dynamic range represented in the display, spectral contrast, and spectral emphasis.Subject Classification: 70.62, 70.40; 85.32.read more
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Book ChapterDOI
History of Sound Recording and Analysis Equipment
TL;DR: The history of the development of sound recorders, transducers (i.e., microphones and hydrophones), and signal processing hardware and software used in animal bioacoustics research can be found in this article .
Journal ArticleDOI
Sound spectrograph: a conversion system for the oscilloscope
D P Donnelly,P S Colyer +1 more
TL;DR: In this article, a system for converting an oscilloscope with z axis control into a sound spectrograph is described, where the output of a digital-to-analogue converter (DAC) is applied to the vertical input of the oscilloscope.
References
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Journal ArticleDOI
Parallel Processing Techniques for Estimating Pitch Periods of Speech in the Time Domain
Ben Gold,Lawrence R. Rabiner +1 more
TL;DR: A computational algorithm for estimating pitch periods of speech in the time domain is presented, and two recent modifications of the algorithm are discussed in detail.
Journal ArticleDOI
Computer-generated spectrogram displays for on-line speech research
TL;DR: A program to generate and display spectrograms on a computer-controlled scanned-display television monitor is described, which features computation of power spectra for selected time segments with the aid of the fast Fourier transform algorithm and four-level intensity quantization.
Journal ArticleDOI
Amplitude Contour Display of Sound Spectrograms
TL;DR: In this paper, a voltage quantizer has been designed which will plot equal-level contours in the frequency/time plane, and the equal level plateaus were selected at 6dB intervals over a 42-db range.