Audio testing system and method

• US 9,204,233 B2
• Filed: 07/16/2012
• Issued: 12/01/2015
• Est. Priority Date: 06/19/2008
• Status: Expired due to Fees

• Current Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Inventors: Liu, Guo-Zhong, Feng, Hui-Ling, Deng, Rui, Lo, Yi
• Primary Examiner(s): MCCORD, PAUL C
• Application Number:
  US13/550,236
• Publication Number:
  US 20120281846A1
• Time in Patent Office: 1,233 Days
• Field of Search: 700/94
• US Class Current: 1/1
• CPC Class Codes: H04R 29/00 Monitoring arrangements; Testing arrangements for hearing aids H04R25/30; detection of loudspeaker connection H04R5/04; sound-field adaptation dependent on speaker detection H04S7/308

Abstract

An audio testing system is configured for receiving an audio signal from the an audio emitting device. The system samples the audio signal and obtains sampling points from the audio signal for determining if the audio signal has been distorted. A related method is also disclosed.

Claims

1. An audio testing method for testing an audio signal, the method comprising:

providing a computer system having a sound card connected to an audio-emitting device;

receiving an audio signal from the audio-emitting device;

sampling the audio signal for obtaining sampling points;

storing the sampling points in a memory system of the computer system, wherein the sampling points are divided into a plurality of groups, the sampling points sampled in each continuous M milliseconds (ms) form one of the groups of sampling points, and M ranges between 20 and 30 ms;

processing each group of sampling points stored in the memory;

taking differences between amplitude values of each two adjacent sampling points via subtraction;

taking absolute values of all the differences and adding up all of the absolute values, and processing an average value of all the absolute values;

determining if the average value is less than N, wherein N ranges between 5-20;

determining that the audio signal has been distorted upon the condition that the average value is less than N; and

determining that the audio signal has not been distorted upon the condition that the average value is equal to or more than N.

2. The audio testing method as claimed in claim 1, further comprising attenuating noises in the audio signal from the audio emitting device via an attenuation circuit, wherein the attenuation circuit is connected between the audio emitting device and the computer system.

3. The audio testing method as claimed in claim 1, wherein M=20, N=10.

4. The audio testing method as claimed in claim 1, wherein upon the condition that the audio signal has been distorted, the audio testing method further comprises:

recording the audio signal as a digital audio signal, and storing the digital audio signal into the memory.

5. The audio testing method as claimed in claim 4, wherein after the storing step, the computer system records a section of the distorted audio signal into a log file.