公开(公告)号：US06845165B1

公开(公告)日：2005-01-18

申请号：US09601515

申请日：1999-12-21

申请人： Haruhiko Motohashi ,  Yasuhiko Mori ,  Mikio Nagashima

发明人： Haruhiko Motohashi ,  Yasuhiko Mori ,  Mikio Nagashima

IPC分类号： G10H1/12 ,  G10H1/16 ,  H03G5/00

CPC分类号： G10H1/12 ,  G10H1/16

摘要： A high pass filter 32 having a cut-off frequency of 200 Hz and a cut-off response of +12 dB/OCT and a low pass filter 33 having a cut-off frequency of 400 Hz and a cut-off response steeper than −24 dB/OCT are used to pick out components in a double overtone region of 200˜400 Hz of a bass musical instrument such as a base or a bass drum from an input audio signal. The component which is picked out is input to distortion applying means 34 having an input-output response which is a non-linear response having no point symmetry with respect to 0 point, thus applying a distortion to cause even-numbered overtone components to be produced. An output from the distortion applying means 34 and the input audio signal are summed in a summer 18 to be delivered. Natural tones which have boosted bass tones and which are free from impurity are obtained.

摘要翻译： 具有200Hz的截止频率和+12dB / OCT的截止响应的高通滤波器32和截止频率为400Hz的截止频率比截止频率更高的低通滤波器33， 24 dB / OCT用于从输入音频信号中挑选低音乐器（例如底座或低音鼓）的200〜400 Hz双重泛音区域中的组件。 选择的分量被输入到具有输入 - 输出响应的失真施加装置34，该输入 - 输出响应是相对于0点没有点对称性的非线性响应，因此施加失真以产生偶数泛音分量 。 来自失真施加装置34的输出和输入音频信号在加法器18中相加以被递送。 获得了提高低音，无杂质的自然色调。