Abstract: A method and apparatus for PTT over IoT is described herein. During operation, each IoT device will be assigned to a talkgroup. Some talkgroups may have a single IoT device assigned, and other talkgroups may have multiple IoT devices assigned. During operation, a control command is received over a first talkgroup that is used to control a first IoT device assigned to that talkgroup. Prior to executing the control command, a set of secondary IoT devices will be determined based on a task assigned to the officer. The secondary IoT devices will be accessed to determine their statuses. The status of the secondary IoT devices will be used as a trigger as to whether or not to allow the control command to be sent to the first IoT device.

Abstract: A method and apparatus for PTT over IoT is described herein. During operation, each IoT device will be assigned to a talkgroup. Some talkgroups may have a single IoT device assigned, and other talkgroups may have multiple IoT devices assigned. During operation, a control command is received over a first talkgroup that is used to control a first IoT device assigned to that talkgroup. Prior to executing the control command, a set of secondary IoT devices will be determined based on a task assigned to the officer. The secondary IoT devices will be accessed to determine their statuses. The status of the secondary IoT devices will be used as a trigger as to whether or not to allow the control command to be sent to the first IoT device.

Abstract: A noise cancelling headphone is described. The noise cancelling headphone utilizes a low power consuming noise cancellation circuit wherein an audio input signal is directly fed into the headphone without the use of an additional headphone amplifier. The noise cancelling circuit uses a microphone to pick up ambient noise and produces a signal which is equal in amplitude but opposite in polarity to the ambient noise signal. The resultant signal is mixed with the audio input signal and fed into the speakers of the headphone. This method is advantageous because it uses fewer components than conventional noise cancellation circuits and it also consumes less power due to the use of fewer components. The distortion of the audio input signal is also reduced since no amplification is performed to the audio input signal onboard the noise cancellation circuit.

Abstract: A noise cancelling headphone is described. The noise cancelling headphone utilizes a low power consuming noise cancellation circuit wherein an audio input signal is directly fed into the headphone without the use of an additional headphone amplifier. The noise cancelling circuit uses a microphone to pick up ambient noise and produces a signal which is equal in amplitude but opposite in polarity to the ambient noise signal. The resultant signal is mixed with the audio input signal and fed into the speakers of the headphone. This method is advantageous because it uses fewer components than conventional noise cancellation circuits and it also consumes less power due to the use of fewer components. The distortion of the audio input signal is also reduced since no amplification is performed to the audio input signal onboard the noise cancellation circuit.