theBoom is patented technology based on
advanced acoustic principals, developed by UmeVoice, Inc. This shape-based solution provides a two-port microphone housing, which cancels out background noise as it hits the front and the back ports.
Thus, the Boom prevents the input of noise from a user's environment. The speaker’s voice, however, is concentrated on the front port and deflected away from the back port. This enables the microphone to transmit a strong speech signal, devoid of background noise.
theBoom sells for about 150USD.