Abstract: A wireless microphone apparatus includes a wireless microphone, a wireless receiver, an external earphone microphone, an external earphone, and a recording device. The wireless microphone includes a transmission and reception circuit. The wireless receiver includes external earphone microphone volume control circuit, a reception and transmission circuit, and an output port. The external earphone microphone is connected with the wireless receiver. The external earphone is connected with the wireless microphone. After the output port is electrically connected with the recording device, the wireless microphone provides a sound reception function, and the external earphone microphone volume control circuit of the wireless receiver controls an audio signal of the external earphone microphone to be supplied to the recording device simultaneously.

Abstract: A wireless microphone structure includes a wireless microphone, a power bank, and a wireless receiver. The wireless receiver is electrically connected with a cell phone and an electronic appliance respectively by a cell phone transmission port and a sound source transmission port, so that the wireless microphone provides a sound source signal to the cell phone and the electronic appliance. The power bank has a top face provided with a recessed charging seat and a bottom face provided with a retaining groove. The wireless microphone is mounted on the charging seat by magnetically attractive connection. The cell phone transmission port protrudes from the top of the wireless receiver and is inserted into and positioned in the retaining groove. The power bank charges the wireless microphone and the wireless receiver constantly after the power bank is charged.

Abstract: A switching device is adapted for a true diversity receiver and contains: a control switch defined between two microcontrollers of two antennas and configured to switch RF wireless microphone signals so that the two microcontrollers execute a single-receiving dual true diversity program or a dual-receiving single true diversity program. The RF wireless microphone signals are received by the two antennas and are decoded to sound signals by two digital decoders respectively, and the sound signals are sent to two audio signal processors by a multiplexer which corresponds to the two microcontrollers to switch the sound signals of a single-receiving dual true diversity or a dual-receiving single true diversity. Thereafter, the sound signals are output by a sound signal mixer.

Abstract: A signal receiving structure of a wireless microphone contains a host controlled by a RS485 and connecting with a plurality of RS485 receivers via plural signal cables. The signal receiving ranges of the plurality of RS485 receivers are overlapped to expand a total receiving range. Any one of the plurality of RS485 receivers transmits at least one microphone signal back to the host through a RS485 remote-control communication interface after receiving the at least one microphone signal. Power is supplied through the plural signal cables from the host, thus expanding the using range of at least one wireless microphone. At least one receiving module in the plurality of RS485 receivers receives the at least one microphone signal, acquires a strong one of the at least one microphone signal by using automatic selection, and outputs the strong one of the at least one microphone signal to the host.

Abstract: A signal receiving structure of a wireless microphone contains: a host controlled by a RS485 and connecting with a plurality of RS485 receivers via plural signal cables, such that signal receiving ranges of the plurality of RS485 receivers are overlapped so as to expand a total receiving range, and any one of the plurality of RS485 receivers transmits at least one microphone signal back to the host through RS485 remote-control communication interface after receiving the at least one microphone signal, and power is supplied to the plural signal cables from the host, thus expanding using range of at least one wireless microphone. At least one receiving module in the plurality of RS485 receivers receives the at least one microphone signal, acquires a strong one of the at least one microphone signal by using automatic selection, and outputs the strong one of the at least one microphone signal to the host.