6. The humanoid robot of claim 5 , wherein the first channel comprises a filter for voice recognition of the messages received by a list of expressions with each of which is associated an expected recognition rate and in that the content of said second message is chosen by a heuristic from a group of requests comprising a request for repetition of said first message on the first channel, a request for confirmation by a third message to be sent by the interlocutor on the first channel of a subset of the expressions of the filter, and a request for sending by the interlocutor of at least another message on at least a third channel.
6. The humanoid robot of claim 5 , wherein the first channel comprises a filter for voice recognition of the messages received by a list of expressions with each of which is associated an expected recognition rate and in that the content of said second message is chosen by a heuristic from a group of requests comprising a request for repetition of said first message on the first channel, a request for confirmation by a third message to be sent by the interlocutor on the first channel of a subset of the expressions of the filter, and a request for sending by the interlocutor of at least another message on at least a third channel. 11. The humanoid robot of claim 6 , wherein said third channel is a channel for visual reception of images of objects corresponding to the list of expressions of the filter of the first channel, said images being compared with a database of images of said objects previously recorded with said expressions and which is accessible by said control module for the inputs/outputs of said communication channels.