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Measurements in room acoustics

Uncertainties and influence of the measurement position

Logos

ISBN 978-3-8325-5529-0

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Bibliografische Daten

Fachbuch

Buch. Softcover

2022

In englischer Sprache

Umfang: 292 S.

Format (B x L): 14,5 x 21 cm

Verlag: Logos

ISBN: 978-3-8325-5529-0

Weiterführende bibliografische Daten

Das Werk ist Teil der Reihe: Aachener Beiträge zur Akustik; 37

Produktbeschreibung

Regardless of the field, measurements are essential for validating theories and making well-founded decisions. A criterion for the validity and comparability of measured values is their uncertainty. Still, in room acoustical measurements, the application of established rules to interpret uncertainties in measurement is not yet widespread. This raises the question of the validity and interpretability of room acoustical measurements.

This work discusses the uncertainties in measuring room acoustical single-number quantities that complies with the framework of the ``Guide to the Expression of Uncertainty in Measurement''(GUM). Starting point is a structured search of variables that potentially influence the measurement of room impulse responses. In a second step, this uncertainty is propagated through the algorithm that determines single-number quantities.

A second emphasis is placed on the investigation of spatial fluctuations of the sound field in auditoria. The spatial variance of the sound field in combination with an uncertain measurement position marks a major contribution to the overall measurement uncertainty. To reach general conclusions, the relation between changes in the measurement location and the corresponding changes in measured room acoustical quantities is investigated empirically in extensive measurement series.

This study shows how precisely a measurement position must be defined to ensure a given uncertainty of room acoustical single-number quantities. The presented methods form a foundation that can be exibly extended in future investigations to include additional influences on the measurement uncertainty.

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Logos Verlag Berlin GmbH

Georg-Knorr-Str. 4, Geb. 10
12681 Berlin, DE

redaktion@logos-verlag.de

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