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JPH096367A Expired / Lapsed JP ⏱️ 0.0 years remaining

Vehicle interior noise reduction device

Assignee: Subaru Corp
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Filing: 1995-06-20
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Granted: —
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Expires: 2015-06-20
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Abstract

Abstract Translated from Japanese (57)【要約】 【目的】安価で、スペースをとらず、軽量で、簡単に騒 音の騒音源信号を精度良く検出し運転条件によらず安定 した制御を行う車室内騒音低減装置を提供する。 【構成】振動伝達力は、エンジンマウント11のマウン トラバーと中間板13に伝達し、圧電材料で形成された 中間板13の力に応じた電圧変化が入力信号変換回路1 4から、プライマリソースPs として適応フィルタ15 とCMN0 回路16とに入力される。適応フィルタ15で はプライマリソースPs はフィルタ係数と合成され、ス ピーカ20から相殺音として発せられ、受聴点で、振動 騒音と相殺音とが干渉し騒音が低減させられ、マイク2 1で騒音低減状態が検出されLMS演算回路17に入力 される。CMN0 回路16ではプライマリソースPs は補 償係数と合成されLMS演算回路17に出力される。そ して、LMS演算回路17で騒音低減状態とCMN0 回路 16からの信号とに基づきフィルタ係数を更新する。 (57) [Abstract] [Purpose] To provide a vehicle interior noise reduction device that is inexpensive, does not occupy space, is lightweight, and can easily detect a noise source signal with high accuracy and perform stable control regardless of operating conditions. . [Structure] The vibration transmission force is transmitted to a mount rubber of an engine mount 11 and an intermediate plate 13, and a voltage change corresponding to the force of the intermediate plate 13 made of a piezoelectric material causes a change in voltage of the input signal conversion circuit 1. 4 from the adaptive filter 15 as the primary source Ps And CMN0 circuit 16 are input. In the adaptive filter 15, the primary source Ps is combined with the filter coefficient and emitted as a canceling sound from the speaker 20, and at the listening point, the vibration noise and the canceling noise interfere with each other to reduce the noise, and the microphone 2 At 1, the noise reduction state is detected and input to the LMS arithmetic circuit 17. In the CMN0 circuit 16, the primary source Ps is combined with the compensation coefficient and output to the LMS operation circuit 17. Then, the LMS operation circuit 17 updates the filter coefficient based on the noise reduction state and the signal from the CMN0 circuit 16.

Inventors

  • 👤 Manpei Tamamura
  • 👤 万平 玉村
  • 👤 Eiji Shibata
  • 👤 英司 柴田

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-02 05:10
CPC Classifications
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