Methods and apparatus to monitor a media presentation are disclosed. An example system includes a monitoring device to monitor a media presentation and generate research data identifying the media. A bridge device includes a housing dimensioned to receive the monitoring device, a receiver carried by the housing to receive a first audio signal via a wireless data connection from an audio source device using a wireless communication protocol, the first audio signal associated with the media. The bridge device includes an audio emitter to emit the audio signal for receipt by the monitoring device, and a transmitter to transmit the audio signal to an audio receiver device using the wireless communication protocol.

Methods and apparatus to monitor a media presentation are disclosed. An example system includes a monitoring device to monitor a media presentation and generate research data identifying the media. A bridge device includes a housing dimensioned to receive the monitoring device, a receiver carried by the housing to receive a first audio signal via a wireless data connection from an audio source device using a wireless communication protocol, the first audio signal associated with the media. The bridge device includes an audio emitter to emit the audio signal for receipt by the monitoring device, and a transmitter to transmit the audio signal to an audio receiver device using the wireless communication protocol.

An implantable battery device is disclosed, which comprises a battery, a first antenna, a second antenna, and a driving unit. The first antenna is configured to inductively supply energy from the battery to a first device and to transmit information received from a processing unit to the first device. The second antenna is provided for wireless communication with a second device. The driving unit is configured to operate the first antenna according to control signals received from the processing unit. The processing unit is configured to transmit control signals to the driving unit to control the inductive supply of energy to the first device, to receive information via the second antenna from the second device, and to transmit information received via the second antenna from the second device to the first device via the first antenna driven by the driving unit.

A hearing device includes first, second, and third antennas oriented respectively along first, second, and third axes that are different from one another. The device includes first channel circuitry coupled to transceive and process antenna signals of each of the antennas. The antennas and the first channel circuitry communicate with another hearing device via a near field magnetic induction (NFMI) signal through a first near field magnetic induction (NFMI) communication channel. Second channel circuitry is coupled to transceive and process the antenna signals of each of the antennas. The antennas and the second channel circuitry communicate with the other device via the NFMI signal through a second NFMI communication channel. Third channel circuitry is coupled to transceive and process the antenna signals of each of the antennas. The antennas and the third channel circuitry communicate with the other device via the NFMI signal through a third NFMI communication channel.

A hearing device includes first, second, and third antennas oriented respectively along first, second, and third axes that are different from one another. The device includes first channel circuitry coupled to transceive and process antenna signals of each of the antennas. The antennas and the first channel circuitry communicate with another hearing device via a near field magnetic induction (NFMI) signal through a first near field magnetic induction (NFMI) communication channel. Second channel circuitry is coupled to transceive and process the antenna signals of each of the antennas. The antennas and the second channel circuitry communicate with the other device via the NFMI signal through a second NFMI communication channel. Third channel circuitry is coupled to transceive and process the antenna signals of each of the antennas. The antennas and the third channel circuitry communicate with the other device via the NFMI signal through a third NFMI communication channel.

A method for transmitting information, a communication device, a portable device and a communication system are provided. The method is applied to a portable device; and the method includes: receiving and/or transmitting information in an electric field coupling manner through a first coupling electrode disposed at the portable device and a second coupling electrode at an opposite end. In an embodiment of the present application, the information is received and/or transmitted through an electric field coupling manner, which could not only improve communication quality and connection reliability on the basis of reducing communication power consumption of a portable device (such as an earphone or a charging case), but also reduce a volume of the portable device, simplify a structure and further improve user experience.

A wireless earphone capable of voice communication includes a first wireless earphone 110 which is paired with a first mobile device 100 and performs transmission and reception, and a second wireless earphone 210 which is paired with a second mobile device 200 and performs transmission and reception, wherein the first mobile device and the first wireless earphone include a pairing unit for pairing the first mobile device and the first wireless earphone and a pairing unit 111 for the first wireless earphone 110, respectively, and the second wireless earphone includes a pairing unit 211 for pairing with the first wireless earphone.

A wireless earphone capable of voice communication includes a first wireless earphone 110 which is paired with a first mobile device 100 and performs transmission and reception, and a second wireless earphone 210 which is paired with a second mobile device 200 and performs transmission and reception, wherein the first mobile device and the first wireless earphone include a pairing unit for pairing the first mobile device and the first wireless earphone and a pairing unit 111 for the first wireless earphone 110, respectively, and the second wireless earphone includes a pairing unit 211 for pairing with the first wireless earphone.

A wireless earphone capable of voice communication includes a first wireless earphone 110 which is paired with a first mobile device 100 and performs transmission and reception, and a second wireless earphone 210 which is paired with a second mobile device 200 and performs transmission and reception, wherein the first mobile device and the first wireless earphone include a pairing unit for pairing the first mobile device and the first wireless earphone and a pairing unit 111 for the first wireless earphone 110, respectively, and the second wireless earphone includes a pairing unit 211 for pairing with the first wireless earphone.

A wireless earphone capable of voice communication includes a first wireless earphone 110 which is paired with a first mobile device 100 and performs transmission and reception, and a second wireless earphone 210 which is paired with a second mobile device 200 and performs transmission and reception, wherein the first mobile device and the first wireless earphone include a pairing unit for pairing the first mobile device and the first wireless earphone and a pairing unit 111 for the first wireless earphone 110, respectively, and the second wireless earphone includes a pairing unit 211 for pairing with the first wireless earphone.