Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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A New Type Speaker Utilizing a Magneto-rheological Fluid Diaphragm

자기유변유체 다이어프램을 이용한 새로운 타입의 스피커

  • Park, Jhin Ha (Department of Mechanical Engineering, Inha University) ;
  • Yoon, Ji Young (Department of Mechanical Engineering, Inha University) ;
  • Kim, Seon Hye (Department of Mechanical Engineering, Inha University) ;
  • Lee, Tae Hoon (Department of Mechanical Engineering, Inha University) ;
  • Lee, Soo Hyuk (Department of Mechanical Engineering, Inha University) ;
  • Choi, Seung Bok (Mechanical Engineering of Inha University)
  • Received : 2016.11.29
  • Accepted : 2016.12.29
  • Published : 2017.04.20
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Abstract

In this work, a new type speaker which features various resonant frequencies is proposed utilizing a magneto-rheological (MR) fluid and its performance is evaluated in terms of the change of the field-dependent sound pressure level. In order to achieve this goal, a whole concept of the speaker system is firstly discussed and subsequently a controllable diaphragm is made using MR fluid whose rheological properties such as viscosity are controllable by the magnitude of magnetic field. Then, the proposed speaker system consisting of the inner structure and the squeeze mode type of MR diaphragm is established in an anechoic room The effectiveness of the proposed speaker system is experimentally evaluated at two different conditions; with and without the magnetic field. It is shown from experimental tests that the sound pressure level at different sound source can be controlled which is not able to achieve using one conventional speaker system.

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References

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