A method of performing sound effect comprising providing a headphone-like or
earphone-like
device with rear speakers carried therein, wherein the headphone-like or earphone-like
device includes an opening for receiving the front speaker signal. Then, the signal
is transmitted to the front, rear and sub-woofer signal to associated speakers.
The signal to the rear speakers is processed by HRTF and means for creating virtual
speakers to obtain virtual speakers of the rear side. The processed signal is transmitted
to the rear speaker.