Acoustics

Yazarlar: ["Miodrag D. Kušljević", "Vladimir V. Vujičić"]

Konular:-

DOI:10.3390/acoustics4010008

Anahtar Kelimeler:Audio signal,Constrained linear least-squares (CLLS),Group delay (GD),Harmonic analysis,Multiple-resonator (MR)-based filter,Total vector gradient (TVG),Voiced speech signal

Özet: : Although voiced speech signals are physical signals which are approximately harmonic and electric power signals are true harmonic, the algorithms used for harmonic analysis in electric power systems can be successfully used in speech processing, including in speech enhancement, noise reduction, speaker recognition, and hearing aids. The discrete Fourier transform (DFT), which has been widely used as a phasor estimator due to its simplicity, has led to the development of new DFT-based algorithms because of its poor performance under dynamic conditions. The multiple-resonator (MR) filter structure proposed in previous papers has proven to be a suitable approach to dynamic harmonic analysis. In this article, optimized postprocessing compensation filters are applied to obtain frequency responses of the transfer functions convenient for fast measurements in dynamic conditions. An optimization design method based on the constrained linear least-squares (CLLS) is applied. This way, both the flatness in the passband and the equiripple attenuation in the stopband are satisfied simultaneously, and the latency is reduced.

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