진동-음향 상반 원리에 이용되는 음원의 유효 면적 측정

The Application of Equivalent Area to the Volume Velocity for Using the Vibro-acoustical Reciprocity

  • 고강호 (대우자동차 기술연구소)
  • 발행 : 1999.10.01

초록

This paper proposes a feasible and effective method for measuring the mechanical-acoustic transfer function by the application of equivalent area and velocity transfer function, a manifestation of the vibro-acoustical reciprocity principle. On the contrary to the volume velocity used in traditional method, the equivalent area is a peculiar raidation characteristics of sound sources and not influenced by any input signal for driving sound source. This invariant property of equivalent area can get rid of boresome works to measure the volume velocity of a sound source every time the driving signal is changed. Moreover, this method has a remarkable advantage to use a general loudspeaker as an accoustic exciter without the assumption of point source and can be applied to all kinds of sound sources even if they are not omni-directional sources.

키워드

참고문헌

  1. SAE Paper 850965 A Study of Noise in Vehicle Passenger Compartment during Acceleration Tsuge, K.;Kanamaru, K.;Kido, T.;Masuda, N.
  2. SAE Paper 951251 Operational Analysis, Transfer Path Analysis, Modal Analysis : Tools to Understand Road Noise Problems in Cars Wyckaert, K.;Van der Auweraer, H.
  3. SAE Paper 972034 Application of Noise Path Analysis Technique to Transient Excitation Gu, P. P.;Juan, J.
  4. SAE Paper 931340 Using Mechanical-Acoustic Reciprocity for Diagnosis of Structure Borne Sound in Vehicles Linden, P. J. G. van der;Fun, J. K.
  5. SAE Paper 971913 Experimental Body Panel Contribution Analysis for Road Induced Interior Noise of a Passenger Car Hendricz, W.;Choi, Y. B.;Lee, H. K.
  6. SAE Paper 972046 Modeling of Airborne Tire Noise Transmission into Car Interior by Using the Vibro-Acoustic Reciprocity and the Boundary Element Method Ih, J. G.;Kim, B. K.
  7. Transmission and Response Sound and Structural Vibration : Radiation Fahy, F.
  8. Fundamentals of Acoustics Kinsler, L. E.;Frey, A. R.;Copprns, A. B.;Sanders, J. V.