Detail publikace

NOISE IN ULTRASONIC TRANSDUCER

Originální název

NOISE IN ULTRASONIC TRANSDUCER

Anglický název

NOISE IN ULTRASONIC TRANSDUCER

Jazyk

en

Originální abstrakt

Thermal noise and polarization noise are the main sources of voltage or current fluctuations in piezoceramic samples which are used as acoustic emission sensors or ultrasonic transducers. Noise is related to the energy dissipation and due to that the conductivity is proportional to the imaginary part of susceptibility and to the frequency. The resonance peaks were observed in the frequency range which corresponds with the geometrical dimensions of the sample. Resonance peaks frequencies are influenced by the mechanical damping. In this contribution we will discuss the impact of mechanical damping on the noise characteristics.

Anglický abstrakt

Thermal noise and polarization noise are the main sources of voltage or current fluctuations in piezoceramic samples which are used as acoustic emission sensors or ultrasonic transducers. Noise is related to the energy dissipation and due to that the conductivity is proportional to the imaginary part of susceptibility and to the frequency. The resonance peaks were observed in the frequency range which corresponds with the geometrical dimensions of the sample. Resonance peaks frequencies are influenced by the mechanical damping. In this contribution we will discuss the impact of mechanical damping on the noise characteristics.

BibTex


@inproceedings{BUT25292,
  author="Jiří {Majzner} and Vlasta {Sedláková} and Pavel {Tofel} and Petr {Sedlák}",
  title="NOISE IN ULTRASONIC TRANSDUCER",
  annote="Thermal noise and polarization noise are the main sources of voltage or current fluctuations in 
piezoceramic samples which are used as acoustic emission sensors or ultrasonic transducers.  Noise is 
related to the energy dissipation and due to that the conductivity is proportional to the imaginary part of 
susceptibility and to the frequency. The resonance peaks were observed in the frequency range which 
corresponds with the geometrical dimensions of the sample. Resonance peaks frequencies are 
influenced by the mechanical damping. In this contribution we will discuss the impact of mechanical 
damping on the noise characteristics.",
  address="Ing. Zdeněk Novotný",
  booktitle="New Trends in Physics",
  chapter="25292",
  institution="Ing. Zdeněk Novotný",
  year="2007",
  month="january",
  pages="94--97",
  publisher="Ing. Zdeněk Novotný",
  type="conference paper"
}