公开(公告)号：US20050220313A1

公开(公告)日：2005-10-06

申请号：US11094054

申请日：2005-03-29

申请人： Mikio Tohyama ,  Yoshinori Takahashi ,  Hiroaki Fujita ,  Hiraku Okumura

发明人： Mikio Tohyama ,  Yoshinori Takahashi ,  Hiroaki Fujita ,  Hiraku Okumura

IPC分类号： H04R3/02 ,  G01R23/16 ,  G10L21/02 ,  H03G3/32 ,  H03G5/00 ,  H04B3/20

CPC分类号： H03G3/32

摘要： A method is designed for emphasizing a howling frequency component of a sound signal observed in an acoustic feedback system during an observation period having a predetermined length. The method is carried out by the steps of successively sampling the sound signal from the acoustic feedback system to provide a running set of samples of the sound signal during the observation period such that a total number of the samples in the running set increments each time one or more of new sample is added to the running set until the total number of the samples corresponds to the predetermined length of the observation period, recurrently calculating a running frequency characteristic of the sound signal on a common frequency axis for the observation period from the running set of the samples each time one ore more of new sample is added to the running set, and accumulating the recurrently calculated running frequency characteristics on the common frequency axis so as to emphasize a howling frequency component contained in the sound signal.

摘要翻译： 一种方法被设计用于在具有预定长度的观察期间中强调在声反馈系统中观察到的声音信号的啸叫频率分量。 该方法通过以下步骤来执行：从声反馈系统连续采样声音信号，以在观察期间提供声音信号的一组运行样本，使得每次运行中的样本总数增加一个 或更多的新样本被添加到运行集合中，直到样本的总数对应于观察期间的预定长度，从运行中循环计算观测期间的共同频率轴上的声音信号的运行频率特性 每次将一个以上新样本添加到运行组中的样本集合，并且累积在共同频率轴上的经常计算的运行频率特性，以便强调包含在声音信号中的啸叫频率分量。