Patent ID: 8050422

Claim:
An audio test apparatus capable of decreasing noise influence, the apparatus comprising: a storage unit; an audio collection device configured for collecting analog audio signals; an audio processing device configured for converting the analog audio signals into digital audio signals or converting the digital audio signals into analog audio signals; a storing module configured for storing the digital audio signals in the storage unit; a Fast Fourier Transform (FFT) module configured for invoking the digital audio signals stored in the storage unit, intercepting digital audio signals of a first predetermined length, and converting the digital audio signals of the first predetermined length into frequency domain signals through a first FFT to obtain a first Fourier spectrum; and also configured for intercepting digital audio signals of a second predetermined length and converting the digital audio signals of the second predetermined length into frequency domain signals through a second FFT to obtain a second Fourier spectrum; a calculating module configured for subtracting amplitudes corresponding to the frequency values belonging to odd points of the second Fourier spectrum from the corresponding amplitudes of the frequency values of the first Fourier spectrum, to obtain frequency domain signals without noise composition; the FFT module being further configured for converting the frequency domain signals into time domain signals though an inverse Fast Fourier Transform (iFFT); and a testing module configured for testing parameters of the time domain signals; wherein the storing module is further configured for storing the amplitudes corresponding to frequency values of the first Fourier spectrum, and the amplitudes corresponding to frequency values belonging to odd points of the second Fourier spectrum.