Switching Amplifier Used in Shunt Negative Impedance Disposals for Active Control of Transducer's Acoustic Impedance
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24220%2F09%3A%230001259" target="_blank" >RIV/46747885:24220/09:#0001259 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Switching Amplifier Used in Shunt Negative Impedance Disposals for Active Control of Transducer's Acoustic Impedance
Original language description
The concept of "active material" with variable acoustic properties is presented. The active material is constituted of an electroacoustic transducer which acoustic impedance can be changed by an active mean. Among the different ways to obtain variable acoustic properties on an electroacoustic transducer's voicing face is the shunting of the transducer's electrical input. The advantage of the active mean is that it should theoretically allow obtaining very high values of acoustic impedances, in other words to even obtain perfect isolating acoustic material. when it comes to absorbing/reflecting very high sound pressure levels, these devices are pushed towards their functional limits. In order to counteract the aforementioned problems, a switching amplifier has been designed for the negative impedance disposal. The present work will describe the design of such a switching amplifier for enhanced stability and performances of the active material concept.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
BI - Acoustics and oscillation
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA101%2F08%2F1279" target="_blank" >GA101/08/1279: Modern methods for noise and vibration suppression using piezoelectric materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 16th International Congress on Sound and Vibration, Cracow, Poland
ISBN
978-83-60716-71-7
ISSN
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e-ISSN
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Number of pages
7
Pages from-to
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Publisher name
International Institute of Acoustics and Vibration (IIAV), Poland
Place of publication
Cracow, Poland
Event location
Krakov, Polsko
Event date
Jul 5, 2009
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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