Environmental noise reduction and cancellation for a communication device including for a wireless and cellular telephone

A noise compensation device for a communications apparatus, comprising:

• a receive input port for receiving a remote user's spoken voice electrical signal and optionally a component of environmental noise signal from the speakers location;
• a microphone for receiving an acoustic air pressure input signal at a location including at least a component of local environmental noise at the speaker's location and for converting the acoustic air pressure input signal into a time varying electrical signal representing the acoustic air pressure input signal at the location;
• a speaker transducer for converting an electrical signal representing a time sequence of sounds into a time varying acoustical signal within a human hearing audio frequency range;
• a first microphone transducer for converting an audio frequency range signal existing in a local environment of the communications apparatus into an electrical signal representing the local audio frequency range signal from the local environment;
• an environmental noise correction or compensation signal generator having:
• (i) an environmental noise correction or compensation signal generator input port for receiving at least a signal derived from the first microphone output, and (ii) an environmental noise correction or compensation signal output port for communicating an environmental noise correction or compensation output signal;
• a continuous time quadrant multiplier or a discrete time processor having:
• (i) a first multiplier input in communication with the first input signal to the speaker, and (ii) a second multiplier input connected to the environmental noise counterbalanced (correction) signal generator output and (iii) a multiplication output;
• and
• a receiver having a received input connected to the multiplication output after receiving from the antenna,
• 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.

A noise compensation device, comprising:

• a first microphone generating a noise signal output;
• an environmental and ambient noise correction circuit having a first input for receiving the noise signal from the first microphone and a second input for a voice signal from a receiver and generating a correction signal from the first and second inputs;
• a continuous time quadrant multiplier or a discrete time processor having a first input for receiving the correction signal output by the environmental noise correction circuit and a second input for receiving the voice signal from the receiver and generating an output signal that is a noise reduced version of the voice signal;
• a dynamic gain circuit for modifying a gain of a component of the continuous time quadrant multiplier;
• a switch for switching the first microphone between a voice sensing mode during a period of speech and a noise sensing mode during periods of listening;
• the receiver generating the voice signal;
• and
• a discrete time processor receiving the voice signal from the receiver and performing a discrete time processing operation on the voice signal before providing it to the continuous time quadrant multiplier.