Systems and methods for reducing electromagnetic radiation emitted from a wireless headset

1. A system comprising:

a mobile device comprising a transmission module for transmitting at least one of data or voice signals over a microwave frequency band; and

a wireless headset comprising a transceiver that enables the wireless headset to wirelessly communicate with the mobile device during a time when the mobile device and wireless headset are linked within a personal area network (PAN);

wherein the wireless headset is configured to receive instructions from the mobile device to enter a sleep mode;

wherein the transceiver is turned off during the sleep mode;

wherein the wireless headset further comprises a microphone configured to receive audio during the sleep mode;

wherein the wireless headset further comprises match detecting circuitry configured to determine whether the received audio matches a predetermined audio file; and

wherein the predetermined audio file includes audio signals of a ringtone of the mobile device.

2. The system of claim 1 ,

wherein the wireless headset further comprises recording circuitry configured to record audio from the mobile device and store an audio file of the recorded audio.

3. The system of claim 1 , wherein:

the mobile device comprises a light emitter configured to emit a light signal indicating a command to the wireless headset to awaken from the sleep mode; and

the wireless headset comprises a light sensor configured to sense the emitted light signal.

4. The system of claim 3 , wherein the wireless headset further comprises light analyzing circuitry configured to determine when sensed light signals are valid light signals emitted by light emitter of the mobile device.

5. A method of enabling a sleep mode for a wireless headset, the method comprising:

receiving instructions from a master device to enter a sleep mode;

in response to receiving instructions to enter the sleep mode, turning off a transceiver of the wireless headset, the transceiver being configured to enable wireless short-range communication between the wireless headset and the master device;

waiting for a signal from the master device;

in response to receiving a valid signal from the master device, turning on the transceiver of the wireless headset; and

wherein waiting for the signal from the master device comprises listening for an audio signal from the master device.

6. The method of claim 5 , further comprising determining whether detected audio signals match a pre-recorded audio file.

7. The method of claim 6 , wherein the pre-recorded audio file is a recording of an audio output from the master device.

8. The method of claim 6 , wherein the pre-recorded audio file is a recording of a voice command from a user of the wireless headset.

9. The method of claim 5 , wherein the master device is a mobile phone device.

10. A wireless headset comprising:

a transceiver configured to wirelessly communicate with a mobile device during a time when the mobile device and wireless headset are linked within a personal area network (PAN), wherein, when the wireless headset is inactive, the transceiver is configured to receive instructions from the mobile device to enter a sleep mode;

switching circuitry configured to turn off the transceiver during the sleep mode;

a receiving mechanism for receiving a wake-up signal from the mobile device when the transceiver is turned off;

wherein the switching circuitry is configured to turn the transceiver on when the wake-up signal is received; and

wherein the receiving mechanism for receiving the wake-up signal comprises a microphone configured to receive an audio signal from the mobile device.

11. The wireless headset of claim 10 , wherein the mobile device is a mobile phone and the audio signal is a ringtone of the mobile phone indicating an incoming call.

12. The wireless headset of claim 10 , wherein the receiving mechanism for receiving the wake-up signal further comprises a comparing mechanism for comparing the received audio signal with a pre-recorded audio file.