A voice assistance device for home automation applications, which comprises: - at least one microphone, - at least one loudspeaker, - a communications interface for connection to a data communications network, - a microprocessor which is programmed to sample the audio signal of the microphone and transmit it, through said communications interface, over said data communications network for subsequent processing, as well as to receive audio streams from said data communications network in digital format, convert them to analog format, and play them on said loudspeaker, and - an electric power supply module, said device being enclosed in a box-like fixture which can be inserted and retained in a module-supporting frame for wall-mounted electrical boxes, and being provided with a power supply terminal strip for the connection of said electric power supply module to a domestic mains electricity supply, characterized in that said microphone is connected to a first amplifier, said loudspeaker is connected to a second amplifier, and in that said voice assistant device comprises a switching device which is interposed in its switching function between said microphone and said microprocessor, the switching device being able to be switched by way of a switch between a first position, in which said microphone is physically connected to the microprocessor, and a second position, in which said microphone is physically disconnected from the microprocessor to protect the privacy of the users, and in that it further comprises signaling means which are functionally connected to said switching device in order to indicate whether it is in said first position or in said second position. - at least one microphone, - at least one loudspeaker, - a communications interface for connection to a data communications network, - a microprocessor which is programmed to sample the audio signal of the microphone and transmit it, through said communications interface, over said data communications network for subsequent processing, as well as to receive audio streams from said data communications network in digital format, convert them to analog format, and play them on said loudspeaker, and - an electric power supply module, said device being enclosed in a box-like fixture which can be inserted and retained in a module-supporting frame for wall-mounted electrical boxes, and being provided with a power supply terminal strip for the connection of said electric power supply module to a domestic mains electricity supply, characterized in that said microphone is connected to a first amplifier, said loudspeaker is connected to a second amplifier, and in that said voice assistant device comprises a switching device which is interposed in its switching function between said microphone and said microprocessor, the switching device being able to be switched by way of a switch between a first position, in which said microphone is physically connected to the microprocessor, and a second position, in which said microphone is physically disconnected from the microprocessor to protect the privacy of the users, and in that it further comprises signaling means which are functionally connected to said switching device in order to indicate whether it is in said first position or in said second position.