Impulse Response Measurement Method and Device

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)).