BlueCat Motors E-books > Acoustics Sound > Audio Bandwidth Extension: Application of Psychoacoustics, by Erik Larsen, Ronald M. Aarts

Audio Bandwidth Extension: Application of Psychoacoustics, by Erik Larsen, Ronald M. Aarts

By Erik Larsen, Ronald M. Aarts

Larsen (speech and listening to bioscience and expertise, Massachusetts Institute of know-how) and Aarts, a researcher within the deepest region within the Netherlands, research functions of bandwidth extension (BWE) to tune and speech, putting unique emphasis on sign processing strategies. protecting concept, purposes, and algorithms, they assessment very important ideas in psychoacoustics, sign processing, and loudspeaker conception, and boost the idea and implementation of BWE utilized to low-frequency sound copy, perceptually coded audio, speech, and noise abatement. an summary of a BWE patent is incorporated. The ebook might be of curiosity to engineers, researchers, and postgraduate scholars in audio, sign processing, and speech.

Show description

Read Online or Download Audio Bandwidth Extension: Application of Psychoacoustics, Signal Processing and Loudspeaker Design PDF

Best acoustics & sound books

Bandwidth Extension of Speech Signals

Bandwidth Extension of Speech indications presents dialogue on varied ways for effective and strong bandwidth extension of speech signs whereas acknowledging the impression of noise corrupted real-world signs. The ebook describes the speculation and techniques for caliber enhancement of fresh speech indications and distorted speech signs comparable to those who have passed through a band obstacle, for example, in a mobilephone community.

Communication Acoustics (Signals and Communication Technology)

Communique Acoustics bargains with the basics of these parts of acoustics that are regarding sleek verbal exchange applied sciences. as a result of the introduction of electronic sign processing and recording in acoustics, those parts have loved a big upswing over the past four many years. The e-book chapters characterize assessment articles protecting the main suitable components of the sphere.

How to Gain Gain: A Reference Book on Triodes in Audio Pre-Amps

The 34 chapters of the second variation of ways to achieve achieve provide an in depth perception right into a assortment (54) of the commonest achieve generating, consistent present producing probabilities, and digital noise construction of triodes for audio pre-amplifier reasons. those chapters additionally supply whole units of formulae to calculate achieve, frequency and section responses, and signal-to-noise ratios of yes development blocks built-up with this sort of vacuum valve (tube).

Additional info for Audio Bandwidth Extension: Application of Psychoacoustics, Signal Processing and Loudspeaker Design

Example text

3 Lumped-element Model For low frequencies, a loudspeaker can be modelled with the aid of some simple elements, allowing the formulation of some approximate analytical expressions for the loudspeaker sound radiation due to an electrical input current, or voltage, which proves to be quite satisfactory for frequencies below the cone break-up frequency. The extreme accelerations experienced by a typical paper cone above about 2 kHz, cause it to flex in a complex pattern. The cone no longer acts as a rigid piston but rather as a collection of vibrating elements.

2 An infinite impulse response (IIR) filter in direct form-I structure. The input signal x(k) is filtered by the filter, yielding the output signal y(k). The boxes labeled ‘T ’ are one sample (unit) delay elements. The signal at each forward tap is multiplied with the corresponding coefficients b, while the signal in the recursive (feedback) part is multiplied with the corresponding coefficients a, respectively and the frequency response can be found by substituting z = e−i . It is obvious that an FIR filter has only zeros and no poles.

12. 2 with ν = 1]). 80) but this is only useful for large values of z. Eqn. 64 and the first term of Eqn. 81) which is in agreement with the large ka approximation, as can also be found in the earlier given references. An approximation for all values of ka was developed by Aarts and Janssen [9]. Here, only a limited number of elementary functions is involved: H1 (z) ≈ 2 − J0 (z) + π 16 sin z 36 −5 + 12 − π z π 1 − cos z . 005. Replacing H1 (z) in Fig. 12 by the approximation in Eqn. 82 would result in no visible change.

Download PDF sample

Rated 4.47 of 5 – based on 38 votes