104 イヤホン再生時の外耳道音響特性に関する研究 : 伝達行列法を用いた共鳴補正フィルタの導出(音・振動の解析)

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  • 104 A study on acoustical characteristics of ear canal by earphones : A derivation of resonance correction filter by using transfer matrix method
  • イヤホン再生時の外耳道音響特性に関する研究(伝達行列法を用いた共鳴補正フィルタの導出)
  • イヤホン サイセイジ ノ ガイジドウ オンキョウ トクセイ ニ カンスル ケンキュウ(デンタツ ギョウレツホウ オ モチイタ キョウメイ ホセイ フィルタ ノ ドウシュツ)

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This paper concerns the improvement of ear-plug type earphones performance. The transmission characteristics of the ear canal with/without earphones are different. Therefore, the sound quality of the earphone is a little poor compared with audio speaker. In addition, it is well-known that the acoustical characteristics of ear canal are individually different with each listener. Then, we predict the acoustical characteristics of ear canal with ear-plug type earphones by using transfer matrix method and study on how to improve the transmission characteristics of the ear canal. In this paper, a method for adjusting the resonance characteristic of the ear canal with earphones to the characteristic of the ear canal of AV speakers without earphones using digital filtering technique is proposed. In the method, the sound improvement reproduction performance is verified on the basis of experiments.

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