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Sound shielding by a piezoelectric membrane and a negative capacitor with feedback control

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24220%2F08%3A%230000916" target="_blank" >RIV/46747885:24220/08:#0000916 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Sound shielding by a piezoelectric membrane and a negative capacitor with feedback control

  • Original language description

    The design and realization of an adaptive sound-shielding system based on a method to control the effective elastic stiffness of piezoelectric materials are presented in this paper. In this system, the sound-shielding effect is achieved by a sound reflection from the piezoelectric curved membrane fixed in rigid frame and connected to an active analog circuit that behaves as a negative capacitor. The acoustic transmission loss through the curved membrane was measured for the incident sound of frequency 1.6 kHz and of acoustic pressure level 80 dB. When the negative capacitor in the system was properly adjusted, the acoustic pressure level of the transmitted sound was reduced from the initial 60 dB to 15 dB by the action of the negative capacitor.

  • Czech name

    Tlumení hluku pomocí piezoelektrické membrány a kondenzátoru se zápornou kapacitou se zpětnovazebním řízením

  • Czech description

    V tomto článku je prezentována realizace a návrh adaptivního systému pro tlumení hluku a vibrací založených na metodě řízení efektivní elastické tuhosti piezoelektrických materiálů. V tomto systému je tlumícího jevu dosaženo pomocí odrazu zvuku od zakřivené piezoelektrické membrány upevněné v pevném rámu a připojené k aktivnímu analogovému obvodu se zápornou kapacitou.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BI - Acoustics and oscillation

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

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

Others

  • Publication year

    2008

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL

  • ISSN

    0885-3010

  • e-ISSN

  • Volume of the periodical

    55

  • Issue of the periodical within the volume

    8

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    8

  • Pages from-to

  • UT code for WoS article

    000258143800018

  • EID of the result in the Scopus database