摘要:
A method, device, system, program and recording medium for impulse response measurement which can improve a measurement accuracy without lowering the S/N ratio over the whole range, from lower frequencies to higher frequencies, of a measuring signal are provided. A signal generation unit (21) of a device for impulse response measurement (10-1) generates a W-TSP signal (x(t)) having characteristics of a TSP signal and a Log-TSP signal. A D/A conversion unit (22) converts the digital signal (x(t)) into an analog signal (x(t)) and outputs the converted signal to a headphone (2) or a speaker (5). An A/D conversion unit (23) inputs an analog signal (y(t)) received by a microphone (3) or a microphone (6) and converts the inputted signal into a digital signal (y(t)). An inverse signal generation unit (24) generates an inverse W-TSP signal (x(t)). A convolution unit (25) convolutes the signal (y(t)) and the inverse W-TSP signal (x−1(t)) thereby to calculate an impulse response (g(t)).
摘要翻译:提供了用于脉冲响应测量的方法,装置,系统,程序和记录介质,其可以在不降低测量信号的低频到更高频率的整个范围上的S / N比的情况下提高测量精度。 用于脉冲响应测量(10-1)的装置的信号产生单元(21)产生具有TSP信号和Log-TSP信号特性的W-TSP信号(x(t))。 D / A转换单元(22)将数字信号(x(t))转换为模拟信号(x(t)),并将转换的信号输出到耳机(2)或扬声器(5)。 A / D转换单元(23)输入由麦克风(3)或麦克风(6)接收的模拟信号(y(t)),并将输入的信号转换为数字信号(y(t))。 逆信号生成单元(24)生成逆W-TSP信号(x(t))。 卷积单元(25)对信号(y(t))和逆W-TSP信号(x -1(t))进行卷积,从而计算脉冲响应(g(t))。
摘要:
The invention relates to a periodic signal processing method, a periodic signal conversion method, and a periodic signal processing device capable of reducing the influence of periodicity without using a spectral model. Time windows are arranged such that a center of each of the time windows is at a division position which divides a fundamental frequency in a temporal direction into fractions 1/n (where n is an integer equal to or larger than 2) so as to extract a plurality of portions of different ranges from a signal having periodicity. A power spectrum for the plurality of portions extracted by the respective time windows is calculated, and the calculated power spectrum is added with a same ratio.
摘要:
The invention relates to a periodic signal processing method, a periodic signal conversion method, and a periodic signal processing device capable of reducing the influence of periodicity without using a spectral model. Time windows are arranged such that a center of each of the time windows is at a division position which divides a fundamental frequency in a temporal direction into fractions 1/n (where n is an integer equal to or larger than 2) so as to extract a plurality of portions of different ranges from a signal having periodicity. A power spectrum for the plurality of portions extracted by the respective time windows is calculated, and the calculated power spectrum is added with a same ratio.