An efficient reverberator structure is proposed for approximating measured reverberation. A fixed convolution matching the early portion of a measured impulse response is crossfaded with a switched convolution reverberator drawing its switched convolution section from the late-field of the measured impulse response. In this way, the early portion of the measured impulse response is precisely re...

A method for reducing interblock interference (IBI) in an impulse response Signal transmitted by a communications channel such as a digital subscriber loop (DSL) channel. The method includes computing a time of reference (TOR) based on a windowing function that assumes that the main lobe Segment of the impulse response Signal does not contribute IBI power and that the tail Segments of the impul...

Characterization of the impulse response for real optical wireless channels states the acces bandwidth of communication. In the case of diffuse infrared wireless channel the impulse response varies abruptly with changes in receiver/emitter position and furniture composition of non-empty rooms, so the development of tools capable of estimating this response in real circumstances is important. In...

Abstract. This paper contains measures to describe the matrix impulse response sensitivity of state space multivariable systems with respect to parameter perturbations.The parameter sensitivity is defined as an integral measure of the matrix impulse response with respect to the coefficients. A state space approach is used to find a realization of impulse response that minimizes a sensitivity me...

In identification or model reduction problems, an important task is the computation of the characteristic polynomial of the original or reduced-order system. Several literature have shown that the characteristic polynomial of a system can be extracted from the information generated by the impulse response data. For continuous systems, the Gram matrix [1,2] and the impulse response Gramian [3] a...

In the impulse response method the Rayleigh integral is converted from a 2-dimensional to a 1-dimensional integral [1]. This assumes that the diffraction impulse response has been derived for the transducer shape used. In the described simulator, this method is not used. One of the reasons is that it is desirable to be quickly able to analyze new transducer shapes. This could also be done using...

Similarity transformations between two di erent minimal realizations of a given impulse response of a Discrete Event System are discussed. In the symmetrized max-algebra an explicit expression can be given for the transformation between an arbitrary minimal realization of a given impulse response and a minimal realization of the same impulse response in a standard form. It is conjectured that a...

Two methods of extending measured room impulse responses below their noise floor and beyond their measured duration are presented. Both methods extract frequency-dependent reverberation energy decay rates, equalization levels, and noise floor levels, and subsequently extrapolate the reverberation decay towards silence. The first method crossfades impulse response frequency bands with a late-fie...

Transient waves, like all other acoustic waves, will diffract around solid objects, such as measurement instrumentation. A derivation of an impulse response function on the surface of a rigid sphere, based on linear, classical scattering theory, is presented. The theoretical impulse response function is validated using an experiment with blast noise. An application of the impulse response funct...