Switching Amplifier Used in Shunt Negative Impedance Disposals for Active Control of Transducer's Acoustic Impedance

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Switching Amplifier Used in Shunt Negative Impedance Disposals for Active Control of Transducer's Acoustic Impedance

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Switching Amplifier Used in Shunt Negative Impedance Disposals for Active Control of Transducer's Acoustic Impedance

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

BI - Akustika a kmity

OECD FORD obor

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Projekt

<a href="/cs/project/GA101%2F08%2F1279" target="_blank" >GA101/08/1279: Moderní metody potlačování hluku a vibrací pomocí piezoelektrických materiálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

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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Počet stran výsledku

7

Strana od-do

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Název nakladatele

International Institute of Acoustics and Vibration (IIAV), Poland

Místo vydání

Cracow, Poland

Místo konání akce

Krakov, Polsko

Datum konání akce

5. 7. 2009

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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