Abstract: An electronic device for point-to-multipoint transmission of a digital signal over a radio communication network includes a transmitter-receiver configured to receive a radio-frequency input digital signal and generate therefrom a baseband digital signal and includes a digital signal processor. The digital signal processor includes a receiving module, an input buffer, an audio decoder module and an output buffer. The transmitter-receiver is further configured to receive the duplicated baseband output digital signal and generate therefrom a radio-frequency output digital signal. The transmitter-receiver is configured to receive the radio-frequency input digital signal on the basis of Bluetooth® specifications and transmit the radio-frequency output digital signal on the basis of Bluetooth® specifications, and the microcontroller is configured to realize a unidirectional asynchronous packet data link.

Abstract: Enhanced safety headphones for listening to audio and music, wherein the wearer decides the degree of sound isolation desired, i.e. audio via bone conduction (no isolation from the surrounding environment), in-ear earpiece (medium isolation from ambient noise), or earpieces covering the outer ear (high isolation from ambient noise). By connecting the preselected adaptor, one will obtain automatic volume adjustment and sound equalization, necessary for an optimal listening result under all conditions. A single product will thus be able to cover three different operating requirements. When worn on bicycles, skis or scooters, an indicator light will warn other circulating vehicles of the user's presence (position light). An acceleration sensor will signal any braking (stop light).