Andrea Communications 3D Surround Sound Recording Ear Buds SB-205B, Black Earphone Bass Expansion: SuperBeam headsets employ powerful neodymium magnets in the speaker transducers providing a wide frequency response of 20Hz-20KHz. The headsets also feature a unique bass-reflex ported earphone housing design for producing deep rich bass, complementing transducer output efficiency of clear midrange and sparking highs. DSDA patented adaptive beam forming: The DSDA algorithm powers Andrea's SuperBeam array microphone system, enabling "Boom Free" performance. The array Microphone system forms an audio pickup beam toward the user's mouth and eliminates background noises that are outside of the beam Pure Audio award winning noise reduction: Reduces repetitive background noise on the both acoustic and electronic system noise. Increases the sound quality of your VoIP calls on applications such as Skype. Binaural 3D surround sound recording: Great for recording live entertainment, music, lectures and even environmental sound samples. SuperBeam microphones are placed in close proximity to the users left and right ears, establishing a "Real Head Transfer Function" acoustic effect. Sound arriving at each microphone is in natural phase and duplicates real ear sound capture. Headphone playback then delivers a virtual 3D surround experience, reproducing one's listening experience. USB digital audio adapter: Hi-fidelity external sound card with HD quality digital sample rates. Audio compatibility for Mac and PC. Provides stereo microphone input to enable SuperBeam headsets