シミュレテッド音響インダクター  [in Japanese] Simulated Acoustic Inductort  [in Japanese]

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Author(s)

Abstract

A new device is proposed which simulates an acoustic inductor using active elements. The sound pressure at a certain point is picked up by a microphone. The medium there is vibrated by an piston at such a velocity as the medium should vibrate if there were a pipe. There is no difference between two cases from the acoustical point of view; the case the medium is vibrated by a piston and the case the medium within a real pipe is vibrating. A trial device was built which employed an electret microphone for picking up the sound pressure and a piezoelectric acuator for vibrating a piston. An experiment of the measurement of cavity capacity was performed with this device. The device was mounted on a container with an empty capacity of 62×10<sup>-6</sup>m<sup>3</sup> to form an acoustic resonator. The capacity of the cavity was varied by filling with water and the resonant frequencies were measured. The reuslts show that the trial device, although the actual dimension of the device is 12mm in diameter and 70mm in length, acts as an acoustic pipe with a length of 1200mm. Finally, the possibility of application of the simulated inductor to the measurement of other quantities is dicussed.

Journal

  • Transactions of the Society of Instrument and Control Engineers

    Transactions of the Society of Instrument and Control Engineers 38(5), 514-516, 2002-05-31

    The Society of Instrument and Control Engineers

References:  3

Codes

  • NII Article ID (NAID)
    10008466551
  • NII NACSIS-CAT ID (NCID)
    AN00072392
  • Text Lang
    JPN
  • Article Type
    SHO
  • ISSN
    04534654
  • NDL Article ID
    6167122
  • NDL Source Classification
    ZM11(科学技術--科学技術一般--制御工学)
  • NDL Call No.
    Z14-482
  • Data Source
    CJP  NDL  J-STAGE 
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