Method for eliminating sound and electronic device performing the same

Abstract

A method for eliminating sound is disclosed. The method is applied to an electronic device capable of connecting with a sound playback device and includes a microphone. The method includes the following steps of: receiving a previous input sound via the microphone to generate a previous input sound signal; transmitting the previous input sound signal to the sound playback device; receiving a current input sound via the microphone to generate a current input sound signal; filtering the current input sound signal by removing the previous input sound from the current input sound signal; playing the filtered current input sound signal.

What is claimed is: 
     
         1 . A method for eliminating sound, which is applied to an electronic device capable of connecting with a sound playback device and comprises a microphone, the method comprising the following steps:
 receiving a previous input sound via the microphone to generate a previous input sound signal;   transmitting the previous input sound signal to the sound playback device;   receiving a current input sound via the microphone to generate a current input sound signal;   filtering the current input sound signal by removing the previous input sound signal from the current input sound signal; and   playing the filtered current input sound signal.   
     
     
         2 . The method as claimed in  claim 1 , wherein the electronic device is connected with the sound playback device via an internet, such that the previous input sound signal is transmitted to the sound playback device via the internet. 
     
     
         3 . The method as claimed in  claim 1 , wherein a distance between the electronic device and the sound playback device is less than 2 meters. 
     
     
         4 . The method as claimed in  claim 1 , wherein removing the previous input sound signal includes identifying a difference in generation times between the previous input sound signal and the current input sound signal relayed by the sound playback device and received by the electronic device. 
     
     
         5 . An electronic device, which is capable of connecting with a sound playback device, comprising:
 a microphone, used for receiving a previous input sound to generate a previous input sound signal;   a microcontroller, electrically connected with the microphone, comprising:
 a control module, used for controlling the previous input sound signal to be transmitted to the sound playback device; the microphone being further used for receiving a current input sound to generate a current input sound signal after the previous input sound signal is transmitted to the sound playback device; 
 a filter module, used for filtering the current input sound signal by removing the previous input sound from the current input sound signal; and 
   a speaker, used for playing the filtered current input sound signal.   
     
     
         6 . The electronic device as claimed in  claim 5 , wherein the electronic device is connected with the sound playback device via an internet, such that the previous input sound signal is transmitted to the sound playback device via the internet. 
     
     
         7 . The electronic device as claimed in  claim 5 , wherein a distance between the electronic device and the sound playback device is less than 2 meters. 
     
     
         8 . The electronic device as claimed in  claim 5 , wherein removing the previous input sound from the current input sound signal includes identifying a difference in generation times between the previous input sound signal and the current input sound signal relayed by the sound playback device and received by the electronic device.