Patent ID: 9332366
Filing Date: 2016-05-03
CPC Classification: H04R

Claim Text:
1. A loudspeaker noise inspection method, the method to be implemented by an electronic device and comprising the steps of: (A) obtaining, using the electronic device, a frequency sweeping audio signal from an audio output generated by a loudspeaker in response to a frequency sweeping audio input signal; (B) performing, using the electronic device, differentiation upon the frequency sweeping audio signal so as to generate a differentiated frequency sweeping audio signal; (C) dividing, using the electronic device, the differentiated frequency sweeping audio signal by a constant which is greater than 2π times a maximum frequency of the frequency sweeping audio signal, so as to obtain an attenuated frequency sweeping audio signal for inspection of a noise pulse in the frequency sweeping audio signal; (D) outputting, using the electronic device, the attenuated frequency sweeping audio signal in one of an audio form and a video form; and (E) inspecting whether a noise pulse is in the attenuated frequency sweeping audio signal presented in one of the audio form and the video form, if the noise pulse is inconspicuous in the attenuated frequency sweeping audio signal, the method further comprising, after step (E): (B1) performing, using the electronic device, differentiation upon the attenuated frequency sweeping audio signal so as to generate a second-order differentiated frequency sweeping audio signal; (C1) dividing, using the electronic device, the second-order differentiated frequency sweeping audio signal by the constant so as to obtain a second attenuated frequency sweeping audio signal; (D1) outputting, using the electronic device, the second attenuated frequency sweeping audio signal in one of the audio form and the video form; and (E1) inspecting whether a noise pulse is in the second attenuated frequency sweeping audio signal presented in one of the audio form and the video form.