Apparatus for providing amplified output from portable electronic devices such as MP3 players
US2008086225A1
Audio converting and playing device
GB0415543D0
A palm type dolby decoding earphone device
GB0415542D0
Wireless transmission of sound signals from a notebook computer
DE102004033100A1
Dolby decoder for use with external signal source e.g. DVD player, has optical plug attached at its input for connection of fiber optic cable with external signal source, and head phone attached at its output
