This article describes an application the author developed in order to compare analysis and synthesis of musical audio signals through Short Time Fourier transform (STFT), Constant Q and Sliding Discrete Fourier Transform (SDFT). This software is the basis for applications of SDFT and Constant Q to other consolidated synthesis techniques. By itself, it is a stand alone instrument for calculatin...

Leaks in pipelines and waterworks are detected using different methods and among them spectral analysis is one of the most interesting ones. Sources of signals to be processed are different, for example: reflected signals from ground penetrating radar and acoustic sources, signals from dedicated sensors mounted on pipelines, etc... In the latter case, magnetic pressure sensors located on the pi...

In analysis-synthesis of musical sounds based on a sinu-soidal model, the diierence between the original signal and the synthesized signal, termed the residual, is typically a broadband noise process. It contains such musical phenomena as ute breath noise or violin bow noise. Synthesis without such \noise" tends to sound artiicial; it is desirable to improve the synthesis realism by modeling th...

Filter banks with fixed time-frequency resolution, such as the Short-Time Fourier Transform (STFT), are a common tool for many audio analysis and processing applications allowing effective implementation via the Fast Fourier Transform (FFT). The fixed time-frequency resolution of the STFT can lead to the undesirable smearing of events in both time and frequency. In this paper, we suggest adapti...

This paper explores two different methods to capture the local anisotropy of locally parallel textures. The corresponding models allow for both an analysis and a synthesis of oriented patterns. The first method models such textures as local oscillations that can be analyzed by a windowed Fourier transform. The resulting model can be sampled by alternating projections that enforce the consistenc...

This paper is part 5 in a series of papers about the Discrete Fourier Transform (DFT) and the Inverse Discrete Fourier Transform (IDFT). The focus of this paper is on the spectrogram. The spectrogram performs a Short-Time Fourier Transform (STFT) in order to estimate the spectrum of a signal as a function of time. The approach requires that each time segment be transformed into the frequency do...

The most popular time-frequency analysis tool, the Short-Time Fourier Transform, suffers from blurry harmonic representation when voiced speech undergoes changes in pitch. These relatively fast variations lead to inconsistent bins in frequency domain and cannot be accurately described by the Fourier analysis with high resolution both in time and frequency. In this paper a new analysis tool, cal...

Personal cars are the largest group of vehicles on the road. Every year a significant increase in this group of vehicles enforces the need to shorten the time of the study of the technical condition on vehicle inspection stations. One of the major components checked during the inspection is vehicle suspension that has a decisive influence on the comfort and safety. Currently, vehicle inspection...

This paper provides a detailed description of the spectral analysis front-end of a melody extraction algorithm. Our particular approach aims at extracting the sinusoidal components from the audio signal. It includes a novel technique for the efficient computation of STFT spectra in different time-frequency resolutions. Furthermore, we exploit the application of local sinusoidality criteria, in ...

cupric oxide nanostructures were synthesized via a simple reaction between copper nitrate and sodium hydroxide using a sonochemical-assisted method. the synthesized cuo was then characterized using x-ray diffraction, scanning electron microscopy, transmission electron microscopy, fourier transform infrared, ultraviolet-visible and photoluminescence spectroscopy. our studies show that the cuo na...