スピーカの最低共振を変化したときの音質の弁別

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書誌事項

タイトル別名
  • Discrimination of Sound Quality in changing the Lowest Resonance of the Dynamic Loudspeaker
  • スピーカ ノ サイテイ キョウシン オ ヘンカ シタ トキ ノ オンシツ ノ ベンベツ

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抄録

The lowest resonance of a cone-type dynamic loudspeaker is one of the most important factors for the quality of sound radiated through it. A low speed analogue computer was used to make a real time simulation of a mechanical vibrating circuit of a loudspeaker, and the discriminal limens of sounds on changing the lowest resonant frequency f_0 and its sharpness Q_0 were obtained. The discriminal limens of the lowest resonant frequency below about 120c/s〜150c/s differe considerably for different source materials, while those over that frequency differ only a little in materials. The discriminal limens of f_0 below about 150c/s shown in level differences of the sound near f_0 are similar to those of Q_0, but differ very much above that frequency. From the results, a mechanism of the discrimination of f_0 below about 120c/s〜150c/s correspond to that of the detection of level difference in a certain band near f_0, and at higher f_0 it corresponds to the mechanism of the detection of frequency difference. It is shown that the reduction in feeling of bass tone with a rise of the lowest resonant frequency can be compensated for by an increase in Q_0. It interestingly corresponds to the hypothesis by Zwicker that the detection of level change is based on the same mechanism as for the detection of frequency change. The discriminal limen became smaller on reducing the higher cut-off frequency. From the results, the ratio of the sound power of the changed part to the over-all power is considered to be significant.

収録刊行物

  • 日本音響学会誌

    日本音響学会誌 20 (4), 235-240, 1964

    一般社団法人 日本音響学会

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