Uncertainties in Acoustical Transfer Functions

Modeling, Measurement and Derivation of Parameters for Airborne and Structure-borne Sound

By (author) Pascal Dietrich

Book cover: Uncertainties in Acoustical Transfer Functions

Extent: 215, 215 pages

Publisher: Logos Verlag Berlin

Subjects: Technical Sciences: Computer Science, Engineering, IT, & Math

Series: Aachener Beiträge zur Technischen Akustik

Series volume number: 16

Language: English

Paperback (Published)

(November 2013)

ISBN: 9783832535513

5.71 x 8.27 inches

Price: $56.00

Out of stock

Synopsis
Contributing Authors

Measured transfer functions of acoustic systems are often used to derive single-number parameters. The uncertainty analysis is commonly focused on the derived parameters but not on the transfer function as the primary quantity. This thesis presents an approach to assess the uncertainty contributions in these transfer functions by using analytic models. Uncertainties caused by the measurement method are analyzed with a focus on the underlying signal processing. In particular, the influence of nonlinearities in the acoustic measurement chain are modeled to predict artifacts in the measured signals and hence the calculated acoustic transfer function. Secondly, characterization methods commonly applied in the field of signal processing are linked to the acoustic scenarios and the main influencing parameters. Acoustic parameters are then derived analytically and by means of Monte Carlo simulations considering the uncertainty of these input parameters. In order to provide airborne applications, analytic models for sound barrier and room acoustic measurements are developed incorporating the directivity and the orientation of the sound source as well as the positions of sources and receivers. The simulated uncertainty contributions are validated by measurements. The same approach is also applied to structure-borne sound applications.

By (author) Pascal Dietrich

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