Patent Document ID: 9215540
Application ID: 14252069
Patent Flag: 1

Claim One:
1. A buzz detecting method for testing whether an under-test sound playing device generates a buzz while playing sound, the buzz detecting method comprising steps of: (A) allowing an audio processing device to output plural baseband signals to the under-test sound playing device, so that plural under-test sound signals corresponding to the plural baseband signals are outputted from the under-test sound playing device, wherein the plural baseband signals have different frequencies, and frequencies of the plural under-test sound signals are identical to corresponding frequencies of respective baseband signals; (B) allowing a sound receiving device to receive the plural under-test sound signals and transmit the plural under-test sound signals to the audio processing device; (C) allowing an application program module to convert the plural under-test sound signals into plural under-test frequency-domain signals corresponding to the plural under-test sound signals through Fourier transform; (D) allowing the application program module to calculate plural under-test noise ratios corresponding to the frequencies of respective under-test sound signals according to respective under-test frequency-domain signals; and (E) comparing the plural under-test noise ratios with plural standard noise ratios of a standard sound playing device, thereby judging whether the under-test sound playing device generates the buzz while playing sound, wherein the standard sound playing device generates plural standard sound signals with plural frequencies corresponding to respective standard noise ratios, wherein if the under-test noise ratio corresponding to any frequency of the plural under-test sound signals is higher than the standard noise ratio corresponding to the frequency by a specified ratio, it is determined that the under-test sound playing device generates the buzz while playing sound.