“The media player may be an audio player, capable, e.g., of playing audio files such as MPEG-3 (MP3) files. Optionally, the media player may include a recording function as well, so that a user can record voice notes. In addition if the headset is being used with a telephone (mobile or landline), the availability of a recording function could make it possible for the user to record all or part of a conversation. Similarly, voicemail messages received on the user’s telephone could be uploaded into the headset for later off-line playback.
Alternatively, given the presence of a microphone in the headset (primarily for use with a telephone), the media player could be configured to respond to voice commands, which could allow more complex commands, including commands to play particular content. In addition, the microphone could be used to detect the ambient noise level, and adjust playback volume accordingly.”