Sound Reproduction System Including Adaptive Compensation of Temperature Fluctuation Effect for Broad-Band Sound Control

• TATEKURA Yosuke

  The Graduate School of Information Science, Nara Institute of Science and Technology

• SARUWATARI Hiroshi

  The Graduate School of Information Science, Nara Institute of Science and Technology

• SHIKANO Kiyohiro

  The Graduate School of Information Science, Nara Institute of Science and Technology

抄録

We describe a method of compensating temperature fluctuation by a linear-time-warping processing in a sound reproduction system. This technique is applied to impulse responses of room transfer functions, to achieve a high-quality sound reproduction system, particularly one that treats high-frequency components. First, the impulse responses are measured before and after temperature fluctuation, and the former are converted to the latter by the proposed process. Next, we design inverse filters for the system, and evaluate the improvement of the reproduction accuracy and spectrum distortion. By the compensation method, we can improve the reproduction accuracy at any frequency. Moreover, we propose an adaptive algorithm for the estimation of a suitable warping ratio, using the observed signal of reproduced sound obtained at only one control point. Using the proposed algorithm, we can improve the reproduction accuracy at each control point by about 14 dB, in which a difference in temperature is 1.4℃.

収録刊行物

• IEICE transactions on fundamentals of electronics, communications and computer sciences

  IEICE transactions on fundamentals of electronics, communications and computer sciences 85 (8), 1851-1860, 2002-08-01

  電子情報通信学会

キーワード

• multichannel sound reproduction system
• inverse filter
• compensation of temperature fluctuation
• broad-band sound control

詳細情報

• CRID: 1572824502216813184
• NII論文ID: 110003209224
• NII書誌ID: AA10826239
• ISSN: 09168508
• Web Site: http://hdl.handle.net/10061/7781
• 本文言語コード: en
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