-
公开(公告)号：EP1600941B1
公开(公告)日：2010-04-28
申请号：EP04714019.9
申请日：2004-02-24
CPC分类号： H04R29/007 , G01H13/00 , H04R3/04 , H04R2227/007
摘要： Resonance frequencies f2, f3 detected in a resonance space are decided to be dip center frequencies. According to the measurement values obtained in a loudspeaker and a microphone in the resonance space, a basic amplitude frequency characteristic Ca and a target amplitude frequency characteristic Cd are obtained. The target amplitude frequency characteristic Cd has a greater smoothness than the basic amplitude frequency characteristic Ca on the frequency axis. The dip attenuation level and sharpness are decided according to the difference between the basic amplitude frequency characteristic Ca and the target amplitude frequency characteristic Cd at the dip center frequencies f2, f3 and in the vicinity thereof.
-
2.发明公开DIP FILTER FREQUENCY CHARACTERISTIC DECISION METHOD 有权VERFAHREN ZUR BESTIMMUNG DER FREQUENZCHARAKTERISTIK EINES SPERRFILTERS
公开(公告)号：EP1600941A1
公开(公告)日：2005-11-30
申请号：EP04714019.9
申请日：2004-02-24
CPC分类号： H04R29/007 , G01H13/00 , H04R3/04 , H04R2227/007
摘要： Resonant frequencies f2 and f3 detected in a resonant space are determined as center frequencies of a dip. Based on measurement values at a speaker and a microphone in the resonant space, a basic amplitude frequency characteristic Ca and a target amplitude frequency characteristic Cd are found. A smoothness degree on a frequency axis is larger in the target amplitude frequency characteristic Cd than the basic amplitude frequency characteristic Ca. A damping level and quality factor of the dip are determined based on a difference between the basic amplitude frequency characteristic Ca and the target amplitude frequency characteristic Cd in the center frequencies f2 and f3 of the dip and frequencies near the center frequencies.
摘要翻译： 在谐振空间中检测到的谐振频率f2和f3被确定为倾角的中心频率。 基于谐振空间中的扬声器和麦克风的测量值，找到基本振幅频率特性Ca和目标振幅频率特性Cd。 频率轴上的平滑度在目标振幅频率特性Cd中大于基本振幅频率特性Ca。 基于基本振幅频率特性Ca和中心频率f2和f3中的中心频率f2和f3之间的中心频率附近的频率的频率特性Cd之间的差异来确定倾角的阻尼水平和质量因子。
-
3.发明公开IMPULSE RESPONSE MEASURING METHOD AND IMPULSE RESPONSE MEASURING DEVICE 审中-公开VERFAHREN UND VORRICHTUNG ZUR MESSUNG VON IMPULSREAKINGEN
公开(公告)号：EP2455768A1
公开(公告)日：2012-05-23
申请号：EP10799765.2
申请日：2010-07-07
发明人： HINO, Shokichiro , KOIDE, Hiroshi , SHOJI, Akihiko , TSUCHIYA, Koichi , ENDO, Tomohiko , XIE, Qiusheng
摘要： An impulse response measurement with high precision is made possible with a simple device or signal processing, even if sampling clocks on the transmitting side and the receiving side are asynchronous at the time of measuring an impulse response of a measured system. An impulse response measuring method includes an input signal generating step of generating an input signal of an arbitrary waveform to be input to a measured system by using a synchronization signal having a first sampling clock frequency, a signal converting step of performing conversion on a measured signal output from the measured system into a discrete value system by using a synchronization signal having a second sampling clock frequency, and an inverse filter correcting step of correcting at least a phase of an inverse filter which is an inverse function of a function showing a frequency characteristic of the input signal according to a frequency ratio of the first sampling clock frequency and the second sampling clock frequency. Then, the impulse response of the measured system is measured using the inverse filter after correction.
摘要翻译： 即使在测量系统的脉冲响应测量时，发射侧和接收侧的采样时钟是异步的，通过简单的设备或信号处理也可以实现高精度的脉冲响应测量。 一种脉冲响应测量方法，包括：输入信号产生步骤，通过使用具有第一采样时钟频率的同步信号，生成要输入到测量系统的任意波形的输入信号;信号转换步骤，对测量信号进行转换 通过使用具有第二采样时钟频率的同步信号将测量的系统输出到离散值系统;以及反相滤波器校正步骤，校正作为示出频率特性的函数的反函数的逆滤波器的至少相位 根据第一采样时钟频率和第二采样时钟频率的频率比来输入信号。 然后，使用校正后的逆滤波器测量测量的系统的脉冲响应。
-
-
搜索结果
3 条记录 (耗时 0.01 秒)
