Analytic Methods of Sound Field Synthesis by Jens Ahrens

By Jens Ahrens

This booklet places the focal point on serving human listeners within the sound box synthesis even though the procedure might be additionally exploited in different functions equivalent to underwater acoustics or ultrasonics. the writer derives a basic formula in keeping with normal quintessential equations and the single-layer strength strategy is pointed out as a useful gizmo for you to derive a normal resolution. He additionally proposes extensions to the single-layer capability strategy which permit for a derivation of particular ideas for round, planar, and linear distributions of secondary resources. in response to above defined formula it truly is proven that the 2 tested analytical ways of Wave box Synthesis and Near-field Compensated larger Order Ambisonics represent particular recommendations to the final challenge that are coated through the single-layer power resolution and its extensions.

Show description

Read or Download Analytic Methods of Sound Field Synthesis PDF

Similar civil & environmental books

Flow and Transport in Fractured Porous Media

This booklet addresses the characterization of stream and delivery in porous fractured media from experimental and modeling views. It offers a accomplished presentation of investigations played and analyzed on diversified scales.

Noise Reduction Analysis (Physics)

Written through a famous authority within the topic region, this publication is a complete research of the idea and functional software of noise relief to various fields. it can be used as a reference through scientists and engineers or in a senior-undergraduate or graduate-level path. the 1st six chapters care for the fundamental mechanisms of sound absorption in which acoustic strength is switched over into warmth in viscous and thermal barriers in a valid box.

Constructuring Smooth Hot Mix Asphalt

Nineteen peer-reviewed papers tackle the most recent concerns affecting the resilient modulus attempt and use of the try effects. Resilient modulus shows the stiffness of a soil lower than managed confinement stipulations and repeated loading. The try out is meant to simulate the tension stipulations that happen within the base and subgrade of a pavement method.

Volcanic Rocks and Soils

Volcanic rocks and soils express a weird mechanical behaviour at either laboratory and in-situ scale because of their commonplace structural characters. Volcanic rocks and soils comprises keynote lectures and papers from the foreign Workshop held in Ischia (Italy), 24-25 September 2015. The publication bargains with contemporary advancements and developments, in addition to case histories, within the geotechnical characterization and engineering functions with regards to volcanic formations.

Additional info for Analytic Methods of Sound Field Synthesis

Sample text

1) are outlined below exemplarily for the x and k x -dimensions respectively. The frequency variable in the time Fourier transform is the radian time frequency ω, which is related to the time frequency f via ω = 2π f. In practice, the time-frequency scale (not the radian frequency scale) is used in order to refer to specific values. The frequency variable in the spatial Fourier transform is the wavenumber in x-direction k x . k x can thus be interpreted as the spatial radian frequency and is of unit rad/m.

By combinations of monopoles located at infinitesimal distance from each other (Gumerov and Duraiswami 2004, p. 71). Lower order multipoles are also referred to as monopoles, dipoles, quadrupoles, octopoles, etc. Multipole expansions are closely related to spherical harmonics expansions with the fundamental difference that the former are not unique and thus do not form a basis in the strict sense. Multipole expansions will only play a marginal role in the context of this book and are therefore not treated in detail but only their existence is mentioned.

The according transforms for decomposition and recomposition are outlined in the respective sections. From above considerations, the meaning of the term spatial bandlimitation becomes clear: Spatial bandlimitation constitutes a recomposition of a given signal using only a subset of the corresponding spectral coefficients and basis functions. 39). , by modifying the boundaries of the integral of the inverse transforms accordingly. The reader might have an intuitive understanding of the effect of bandlimiting a time-domain signal in terms of the way the timbre of the signal changes.

Download PDF sample

Rated 4.38 of 5 – based on 21 votes