Detection of the speech activity of a source

A device for the detection of a source of a voice, the device comprising microphone means for receiving a voice signal and means for detecting a voice from a received voice signal, wherein the device further comprises:

• means for determining a direction of arrival of the received signal,
• means for storing an assumed direction of arrival of a certain source of voice;
• means for comparing the direction of arrival of said received signal and said assumed direction of arrival;
• and
• means for indicating that a source of the voice is said certain source when said comparison indicates that the direction of arrival of said received signal matches with said assumed direction of arrival within a certain tolerance, wherein the device further comprises in a certain direction to said microphone means:
• voice reproduction means for voice reproduction, and that said means for storing the assumed direction of arrival of a source have been arranged to store the assumed directions of arrival of the voices of at least two different sources, in which case a first source is the user of the device and a second source is said voice reproduction means and a first assumed direction of arrival is the assumed direction of arrival of the voice of the first source and a second assumed direction of arrival is the assumed direction of arrival of the voice of the second source, and means for detecting the source of a voice have been arranged to indicate the user of the device to be the source of the voice when said comparison indicates that the direction of arrival of said received signal is closer to said first than to said second assumed direction of arrival.