Patent ID: 7742790

Claim:
A communications device, comprising: a speaker containing an input of both voice and environmental noise; a first transmit microphone having a first microphone output providing a first signal containing substantially only environmental noise; an environmental noise counterbalanced (correction) signal generator having (i) an environmental noise counterbalanced (correction) signal generator input connected to both the speaker input and the second microphone output and (ii) an environmental noise counterbalanced (correction) signal generator output; a continuous time quadrant multiplier or a discrete time processor having (i) a first continuous time quadrant multiplication input in communication with the first input signal to the speaker and (ii) a second continuous time quadrant multiplication input connected to the environmental noise counterbalanced (correction) signal generator output and (iii) a multiplication output; a dynamic gain circuit for providing a dynamic gain signal to the continuous time quadrant multiplication; a receiver having a received input connected to the multiplication output after receiving from the antenna; a discrete time unit or processing block with or without signal processing interposed between the first microphone and the continuous time quadrant multiplication; wherein environmental noise picked up by the recipient and by the second microphone is processed by the environmental noise counterbalanced (correction) signal generator and wherein the environmental noise is attenuated at the speaker recipient unit after being passed through the receiver.