A method of managing a streamed audio communication session between a plurality of user devices (37a, 37b, 37c, 40a, 40b), the user devices being configured to send streamed data indicative of received audio contributions from respective participants in a multiple-participant audio communication session via a communications network to one or more other user devices (37a, 37b, 37c, 40a, 40b) for conversion to audio representations of said received audio contributions for one or more respective other participants; the method comprising: monitoring audio contributions from respective participants (4a, 4b), and in response to detection therefrom that a first participant is beginning to make an audio contribution at a first one of said user devices after a period of silence in the audio communication session, providing a signal for at least one of said other user devices indicating that the first participant is beginning to make an audio contribution; in response to receipt at said at least one other user device of a signal indicating that the first participant is beginning to make an audio contribution, triggering a predetermined audible indication for a respective participant at said at least one other user device indicating that said first participant is beginning to make an audio contribution; wherein the method is further characterised in that: the predetermined audible indication for a respective participant at said at least one other user device indicating that said first participant is beginning to make an audio contribution is an audio representation of data previously stored at said at least one other user device, the data previously stored at said at least one other user device being a representation of a sound previously received from said first participant at said first one of said user devices and/or data determined in dependence on analysis of previously received audio contributions from said first participant at said first one of said user devices. monitoring audio contributions from respective participants (4a, 4b), and in response to detection therefrom that a first participant is beginning to make an audio contribution at a first one of said user devices after a period of silence in the audio communication session, providing a signal for at least one of said other user devices indicating that the first participant is beginning to make an audio contribution; in response to receipt at said at least one other user device of a signal indicating that the first participant is beginning to make an audio contribution, triggering a predetermined audible indication for a respective participant at said at least one other user device indicating that said first participant is beginning to make an audio contribution; wherein the method is further characterised in that: the predetermined audible indication for a respective participant at said at least one other user device indicating that said first participant is beginning to make an audio contribution is an audio representation of data previously stored at said at least one other user device, the data previously stored at said at least one other user device being a representation of a sound previously received from said first participant at said first one of said user devices and/or data determined in dependence on analysis of previously received audio contributions from said first participant at said first one of said user devices.