Abstract: The present invention provides a wireless electronic device for audio signal procession and transmission. In one embodiment, the wireless electronic device comprises a primary unit being worn on one ear of a user, wherein the primary unit comprises a main electrical circuitry for receiving, processing, and transmitting audio signals, wherein the audio signals may be received from different sources; a speaker being electronically coupled to the main electrical circuitry for outputting the processed audio signals to a user; a microphone being electronically coupled to the main electrical circuitry for audio signal inputting to the main electrical circuitry; an interface being electronically coupled to the main electrical circuitry for allowing connection with a secondary attachment; and a power source for powering the wireless electronic device; whereby when the interface is not connected with the secondary attachment, the wireless electronic device functions as a mono headset.

Abstract: The present invention provides a wireless communication system with echo control and noise cancellation. The present invention also provides a method with phase reversion for echo control of a wireless communication system wherein the wireless communication system comprises closely disposed speakers and acoustic sensors. The present invention further provides a method with beamforming for noise cancellation of a wireless communication system wherein the wireless communication system comprises two separate units disposed in distance, and wherein each unit comprises an acoustic sensor.