A PRACTICAL METHOD FOR MEASURING CHARACTERISTIC PARAMETERS OF AUDIO SIGNALS

Zhi Dong Liu, Xue Zhong Ai, Ye Li Yang

ABSTRACT: A practical method for measuring the characteristic parameters of audio signals is introduced. This paper gives the derivation of the formula of mathematical model and expounds the theoretical basis of the measurement of the characteristic parameters of the audio signal. In this paper, the reason of error of measuring frequency and amplitude of the Fourier transform method is analyzed, and the mathematical model for improving measuring accuracy is established by data fitting. By MATLAB simulation, the simulation of the Fourier transform method can be used to measure the characteristic parameters of audio signals.

Keywords: Voice frequency signal, Sound detection, MATLAB, Simulate the Fourier transform.