Titlebook: Adaptive Feed-Forward Control of Low Frequency Interior Noise; Thomas Kletschkowski Book 2012 Springer Science+Business Media B.V. 2012 AN

legislate

https://doi.org/10.1007/978-3-642-91197-2rbances. Besides the topic of ., attention is paid to . that enables the controller to track down non-stationary effects, e.g. the change of the operational speed of a turbo-machinery, or changes in the system response that can be caused by a change of environmental conditions such as ambient pressu

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演绎

,Die Wirkungsgröße im Hemmungsversuch,e for ANC-system design. It is based on five overlapping design steps. Every design step requires the handling of specific design tasks. Successful processing of these design tasks enables successful completion of design steps. This is expressed by an increase of system maturity. The latter is asses

侵害

,Die Wirkungsgröße im Hemmungsversuch,ANC-system design tools (discussed in Chap. .). The approach is basically similar to other investigations, compare e.g. (Rafaely et al. in J. Acoust. Soc. Am. 116(2):787–793, .). However, the long-term objective is to develop a simple, small, portable, and highly effective ANC-system to be utilized

陪审团

fledged

,Die Wirkungsgröße im Hemmungsversuch,ell as by external sources and mapped with a custom-built microphone array. A matching finite element model was developed. As it will be shown in the following chapter, the acoustic variables were calculated from the measured data with success.

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Sterilisation der Verbandstoffeoth the idea and the limits of active control. Furthermore, it will be necessary to describe the interior noise problem and to distinguish between different concepts that can be used to reduce interior noise by means of active control. The upcoming chapter is therefore subdivided into four sections.

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乳白光

Sterilisation der Verbandstoffer filled interior. To establish a control concept, it is important to know what field variables can be used to describe the transfer behavior of this basic system or to receive information about the systems state. For this reason, basic acoustic field variables such as the acoustic pressure, the aco

Abrupt

Wesen und Bedeutung der Sterilisationthe state of interior noise fields is based on the observation of the acoustic pressure. This field variable is detected by microphones. Vectorial field variables such as the sound intensity can be approximated by sound pressure measurements, using two (or more) microphones. However, in some applica