The mel-scaled frequency cepstral coefficients (MFCCs) derived from Fourier transform and filter bank analysis are perhaps the most widely used front-ends in state-of-the-art speech recognition systems. One of the major issues with the MFCCs is that they are very sensitive to additive noise. To improve the robustness of speech front-ends with respect to noise, we introduce, in this paper, a new...

The Fourier spectrum of waves in the Pacific Ocean is analysed. The power in 4 s waves is more regular than the power in 10 s waves and larger than expected.

there are various approaches for depth estimation of anomalous potential field data. spectral analysis of gravity and magnetic data has been used extensively for many years to derive the depth to certain geological structures, such as the magnetic basement or the curie temperature isotherm. the interpretation of the gravity and magnetic data is preferred in frequency domain because of simple re...

In measuring the power spectrum of the distribution of large numbers of dark matter particles in simulations, or galaxies in observations, one has to use Fast Fourier Transforms (FFT) for calculational efficiency. However, because of the required mass assignment onto grid points in this method, the measured power spectrum 〈|δf (k)|2〉 obtained with an FFT is not the true power spectrum P (k) but...

The Fourier transform of a dataset apodised with a window function is known as the Gabor transform. In this paper we extend the Gabor transform formalism to the sphere with the intention of applying it to CMB data analysis. The Gabor coefficients on the sphere known as the pseudo power spectrum is studied for windows of different size. By assuming that the pseudo power spectrum coefficients are...

Described here is a route navigation method for a mobile robot with an omnidirectional image sensor. The route is memorized by a series of two dimensional Fourier power spectrums of consecutive omnidirectional images at the horizon while the robot moves to the goal position. While the robot is navigating to the goal point, it is controlled by comparing the principal axis of inertia of its curre...