Patent Publication Number: US-2021166688-A1

Title: Device and method for performing environmental analysis, and voice-assistance device and method implementing same

Description:
TECHNICAL FIELD 
     The invention relates to a device for performing environmental analysis, in particular a sound-analyzing object. Generally, the invention relates to voice assistance. 
     PRIOR ART 
     Voice assistance, which at the present time is present on our smartphones and tablets in the form of software applications such as Google Assistant™, Amazon Alexa™, Siri™, Djingo™, etc. but also available in the form of smart speakers or voice assistants such as Google Home™, Apple HomePod™, Amazon Echo™, Djingo Speaker™, etc. is a human-machine interface via audio. 
     It uses a microphone to listen to the environment in order to detect the voice-assistance activation voice command, then, once activated, to receive and process voice commands from the user. 
     The problem is that currently users are being warned by certain papers that certain devices employing voice assistance seem to record more information than intended and even to transmit information to equipment for providing the voice-assistance service located outside of the home communication network. Even if these faults have been resolved and were not the subject of sale to the general public, inter alia, this has reinforced the aversion of some of the general public to acceptance of voice assistance. In order to allow a wider deployment of these smart speakers, the latter must be designed to increase confidence in the digital world of the smart home while respecting privacy even though these two tendencies are sometimes antagonistic to the services performed by these new technologies. 
     In order to respect privacy, the microphone arrays of smart speakers point toward the person speaking or, more precisely, privilege, by virtue of source separation, a listening direction. Next, these smart speakers extract a linguistic signal from the captured signal (especially by separating the linguistic signal and ambient noise or clamor in this captured signal). Thus, the word recognition receives a signal of better quality improving its recognition performance. 
     However, these processing operations are imperceptible to the user. The latter is unaware that the smart speaker is focused on what he is saying rather than what his neighbor is saying because the reply delivered by the smart speaker is ostensibly relevant to the dialogue intentionally initiated by the user with the smart speaker. 
     In contrast, when a first person engages in a dialogue with a smart speaker, but the smart speaker is better able to capture what a second person is saying, the dialogue will be centered on the words spoken by the second person. The two persons will then be unsettled because the first person will not obtain his reply and the second person will realize that the smart speaker was listening to him even though he was not speaking to it. 
     For this reason, currently, there is a perception that smart speakers are listening to everything. This perception is slowing the adoption and use of smart speakers, which may especially be used to optimize the use of household resources. More generally, a microphone that captures ambient noise is a problem with regard to acceptance of a system equipped with such a microphone, for reasons to do with protection of privacy. 
     SUMMARY OF THE INVENTION 
     One of the aims of the present invention is to remedy drawbacks/insufficiencies of the prior art/to provide improvements with respect to the prior art. 
     One subject of the invention is an electronic device for performing environmental analysis, comprising:
         a system for monitoring an environment in which the electronic device for performing environmental analysis is placed, and   a visual physical indicator controlled depending on at least one command parameter delivered by the monitoring system.       

     Thus, the user of the electronic device is able to perceive the object of attention of the monitoring system since the monitoring system provides feedback by means of one or more visual indicators that the monitoring system commands. 
     Advantageously, the visual physical indicator is a simulator of a facial element of a living being. Thus, the risk of errors in interpretation by the user or a third-party device of the data captured by the monitoring system is decreased because the user is used to interpreting certain facial behaviors. The third-party device is especially a video surveillance device for monitoring the dwelling in which the monitoring system is placed. 
     Advantageously, the visual physical indicator comprises a set of rendering devices. 
     Thus, since certain of the rendering devices may be controlled independently and/or other rendering devices may be controlled conjointly, depending on the same data or separate captured data, the risks of errors in interpretation by the user or a third-party device of the data captured by the monitoring system is decreased. 
     Advantageously, when the set of rendering devices comprises more than one rendering device, the rendering devices of the set are conjointly controllable depending on at least one command parameter delivered by the monitoring system. 
     Thus, simultaneous command of a plurality of parameters allows the degree of confidence of the monitoring system in the captured data to be transmitted. 
     Advantageously, the rendering devices consist of at least one of the following devices:
         a diode;   a matrix-array display;   a screen;   a moving part of the electronic device of performing environmental analysis.       

     Thus, the precision of the interpretation by the user or a third-party device of the data captured by the monitoring system increases or decreases depending on the one or more visual physical indicators used. 
     Advantageously, the monitoring system comprises a sensor and an analyzer that receives data captured by the sensor and that controls the visual physical indicator by transmitting thereto at least the command parameter. 
     Thus, the analyzer is able to control with relative subtlety the visual physical indicator, depending on its analysis capacity: direction of monitoring focus, ability to monitor one or more types of captured data (sound, image, video, vibrations, etc.), ability to distinguish between the number of sources captured, the type of sources captured, the type of interaction with the captured source, etc. 
     Advantageously, the monitoring system comprises at least one system from the following:
         a listening system,   a video monitoring system,   a haptic/touch monitoring system.       

     Advantageously, the listening system comprises at least one device from the following:
         a microphone,   a breakout board equipped with a least one microphone.       

     Advantageously, the listening system comprises a plurality of unitary microphones forming an array of microphones integrated into the device for performing environmental analysis. 
     Thus, depending on the arrangement of the array and on the position of the device for performing environmental analysis in a given environment, the device for performing environmental analysis listens to sound from a given portion or the entirety of the environment. 
     Advantageously, the electronic device for performing environmental analysis comprises at least one connector able to allow the transmission of a command from the electronic device performing environmental analysis to a controllable electronic device, the command being delivered by the monitoring system. Thus the risk of untimely command or of erroneous command of a remote controllable electronic device is decreased. 
     Another subject of the invention is a method for performing environmental analysis, said method being implemented by an electronic device for performing environmental analysis and comprising:
         monitoring an environment in which the electronic device for performing environmental analysis is placed,   generating a visual physical rendering depending on a command parameter resulting from the analysis of the captured data.       

     Advantageously, the command parameter is determined on the basis of a portion of the data captured in the environment, the portion of the captured data being relative to one data source in the environment. 
     Advantageously, the monitoring comprises
         capturing data from the environment, and   analyzing the captured data to deliver the command parameter.       

     Advantageously, the method for performing environmental analysis comprises sending a notification to a communication terminal, the notification being generated depending on the result of the analysis of the captured data. 
     Yet another subject of the invention is a voice assistant connected to a communication network allowing at least one service performed by a communication device of the communication network to be controlled, the voice speaker comprising:
         a system for monitoring an environment in which the voice assistant is placed, and   a visual physical indicator controlled depending on at least one command parameter delivered by the monitoring system.       

     Thus, not only is acceptance by the user of a voice assistant in his environment increased because the user perceives the actions of the monitoring system, but furthermore the risk of untimely or erroneous use of the voice assistant is limited. 
     Another subject of the invention is a voice-assistance method implemented by a communication terminal connected to a communication network, comprising controlling at least one service performed by a communication device of the communication network other than the communication terminal, the voice-assistance method comprising:
         monitoring an environment in which the communication terminal is placed,   generating a visual physical rendering depending on a command parameter resulting from the analysis of the captured data.       

     Advantageously, according to one implementation of the invention, the various steps of the method according to the invention are implemented by a software package or computer program, this software package comprising software instructions intended to be executed by a data processor of a device for performing environmental analysis and/or a voice assistant and being designed to control the execution of the various steps of this method. 
     The invention therefore also relates to a program containing program-code instructions for executing steps of the method for performing environmental analysis and/or of the voice-assistance method when said program is executed by a processor. 
     This program may use any programming language and take the form of source code, object code or code intermediate between source code and object code such as code in a partially compiled form or any other desirable form. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Features and advantages of the invention will become more clearly apparent on reading the description, which is given by way of example, and the figures, which are referred to in the description, and which show: 
         FIG. 1 , a simplified schematic of a device for performing environmental analysis according to the invention, 
         FIG. 2 , a simplified schematic of a method for performing environmental analysis according to the invention, 
         FIG. 3 , a simplified schematic of one embodiment of a device for performing environmental analysis according to the invention, 
         FIG. 4 , a simplified schematic of a communication architecture comprising a device for performing environmental analysis according to the invention, 
         FIG. 5 , a simplified schematic of a device for performing environmental analysis comprising a sensor array according to the invention, 
         FIG. 6 a   , a simplified schematic of a device for performing environmental analysis in a first exemplary monitoring state according to the invention, 
         FIG. 6 b   , a simplified schematic of a device for performing environmental analysis in a second exemplary monitoring state according to the invention, 
         FIG. 6 c   , a simplified schematic of a device for performing environmental analysis in a third exemplary monitoring state according to the invention, 
         FIG. 6 d   , a simplified schematic of a device for performing environmental analysis in a fourth exemplary monitoring state and a first example of a monitoring result according to the invention, 
         FIG. 6 e   , a simplified schematic of a device for performing environmental analysis in a second example of a monitoring result according to the invention, 
         FIG. 6 f   , a simplified schematic of a device for performing environmental analysis in a third example of a monitoring result according to the invention, 
         FIG. 6 g   , a simplified schematic of a device for performing environmental analysis in one exemplary state of the analysis-performing device according to the invention, 
         FIG. 7 , a simplified schematic of a voice assistant according to the invention, 
         FIG. 8 , a simplified schematic of a voice-assistance method according to the invention. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
       FIG. 1  illustrates a simplified schematic of a device for performing environmental analysis according to the invention. 
     The electronic device  1  for performing environmental analysis comprises:
         a system  10  for monitoring an environment E in which the electronic device  1  for performing environmental analysis is placed, and   a visual physical indicator  11   1 , . . . , 11   V  controlled depending on at least one command parameter pcmd delivered by the monitoring system  10 .       

     The visual physical indicator  11   1 , . . . , 11   V  is a human-machine interface that especially indicates in which direction the attention of the monitoring system  10 , and especially of the one or more microphones of this monitoring system  10 , is being focused, in particular when said system is able to perceive/is listening to words spoken by a person, changes person, detects a specific event (especially a specific sound) or begins to monitor a new signal. 
     In particular, the visual physical indicator  11   1 , . . . , 11   V  is a simulator of a facial element of a living being. In particular, a simulator of a facial element of an animal, of a human or of a humanoid, such as a simulator of gaze direction, a simulator of facial expressions, a simulator of position of a body part of an animal (ears, tail, etc.), may be used. The simulator of a facial element of a living being copies the movement, position, etc. of this facial element depending on the environmental context cntxte, which is for example delivered by the monitoring system  10  in the command parameter pcmd. 
     In particular, the visual physical indicator  11   1 , . . . , 11   V  comprises at least a rendering device  111   1   1 , . . .  111   1   R  and a controller  112   1 . The controller  112   1  uses the command parameter cmd to trigger a state of one or more rendering devices  111   1   1 , . . .  111   1   R . For example, the state is selected by the controller  112   1  from a list of possible states of the rendering device  111   1   1 , . . .  111   1   R . In another example, depending on the type of rendering device, the state designates a behavior performed by the visual physical indicator  11   1 , . . . , 11   V  depending on the environmental context cntxte when the visual physical indicator  11   1 , . . . , 11   V  is a simulator of a facial element. In particular, when the rendering device is an LED, the state may be a light-intensity level, a color, etc. If the rendering device is a black-and-white mini-screen simulating an eye, the state may be a pupil shape: round, slit, closed and/or a position: right, left, top, bottom, etc. 
     In particular, the physical visual indicator  11   1  comprises a set of rendering devices { 111   1   1  . . .  111   1   R }. In particular, the rendering devices  111   1   1  . . .  111   1   R  may be identical (the same type of screen or motorized part, etc.) for example in order to respectively mimic two eyes, two ears, etc., or be different in order to mimic various elements of the face of a living being: eye, ear, etc. 
     In particular, when the set of rendering devices { 111   1   1  . . .  111   1   R } comprises more than one rendering device  111   1   1  . . .  111   1   R , the rendering devices of the set { 111   1   1  . . .  111   1   R } are controllable conjointly depending on the at least one command parameter pcmd delivered by the monitoring system. For example, two screens simulating eyes and/or two motorized parts simulating ears are controlled conjointly to indicate a direction (the two eyes and/or the two ears point in a single direction), a doubt, a reflection, etc. 
     In particular, the rendering devices consist of at least one of the following devices:
         a diode;   a matrix-array display;   a screen;   a moving part of the electronic device for performing environmental analysis.       

     The moving parts of the electronic device for performing environmental analysis especially simulates an ear, a tail, etc. The mobility of the part is controllable especially by means of a motor. The mobility is for example a mobility in rotation and/or an angular mobility (the ear making an angle of 0 to 180° to a lateral surface of the device for performing environmental analysis). 
     In particular, the monitoring system  10  comprises a sensor  101   1  . . .  101   N  and an analyzer  102  that receives captured data dc 1  . . . dc N  from the sensor  101   1  . . .  101   N  and the controls the visual physical indicator  11   1  . . .  11   V  by transmitting thereto at least the command parameter pcmd. 
     In particular, the monitoring system  10  comprises at least one system from the following:
         a listening system,   a video surveillance system,   a haptic and/or touch monitoring system.       

     By listening system, what is meant is a system able to monitor the audio environment: word(s) and/or sound(s), such as sounds emitted by electronic or non-electronic objects: sound of keys on a table, sound of a window being open/closed, sound indicating the end of a cooking time, sound of a dishwasher working, boiling water, etc. 
     By video surveillance system, what is meant is a system able to monitor for the presence of a person or apparatus in the environment (and especially allowing the person and/or apparatus to be identified and located in the environment). 
     By touch monitoring system, what is meant is a system able to monitor contacts with the device for performing environmental analysis. In particular, the electronic device for performing environmental analysis comprises at least one touch surface and/or all or part of the external surface of the object is a touch surface: for example the top part and/or the one or more lateral parts and/or the front part and/or, in the case where the electronic device for performing environmental analysis is placed on a horizontal surface, the rear part and/or, in the case where the object is placed against a vertical surface, the bottom portion. Thus, the touch monitoring system detects the contact of a person with the electronic device for performing environmental analysis and/or the position of the person with respect to this device for performing environmental analysis. 
     By haptic monitoring system, what is meant is a system able to monitor vibrations and movements. In particular, the electronic device for performing environmental analysis is equipped with vibration and/or movement sensors such as accelerometers that are able to detect:
         an object, an apparatus or a person placed in contact with the horizontal surface on which the electronic device for performing environmental analysis is placed;   a movement or a vibration of the vertical surface on which the electronic device for performing environmental analysis is placed, such as the movement of the door on which it is placed (a fridge or freezer being opened/closed) or the vibration of a wall on which it is placed (door and/or window of this wall being opened/closed);   an airflow generated by a door/window being opened/closed; etc.       

     In particular, the listening system  10  comprises at least one device among the following:
         a microphone,   a breakout board equipped with at least one microphone.       

     In particular, the listening system  10  comprises a plurality of unitary microphones forming an array of microphones integrated into the electronic device  1  for performing environmental analysis (as especially illustrated in  FIG. 5 ). 
     In particular, the electronic device  1  for performing environmental analysis comprises at least one connector  13  able to allow the transmission of a command cmd from the electronic device  1  for performing environmental analysis to a controllable electronic device  3 . The command cmd is delivered by the monitoring system  10 . 
     In particular, the electronic device  1  for performing environmental analysis comprises at least one notification generator  14  able to generate, depending on the command parameter, a notification ntf, and a transmitter  15  able to send the generated notification ntf from the electronic device  1  for performing environmental analysis to a controllable electronic device  3 . 
     Electronic device  1  for performing environmental analysis is placed in a given environment E, for example an interior space such as a room of a house, of an apartment, of an office block, a garage, a region of a hangar, of a factory, etc., or an exterior space such as a patio, a parking lot, a space containing a swimming pool, etc. 
     The monitoring system  10  monitors this environment E by virtue of various signals s 1  . . . s O  emitted thereby: audio signals, light signals, vibrations, touch signals, etc. 
     In particular, the monitoring system comprises one or more sensors  101   1  . . .  101   N  that capture some of these signals: signals of a single type (audio sensors or video/image sensors or haptic sensors, etc.) or of various types (audio sensors and/or video/image sensors and/or haptic sentences, etc.) that deliver, on the basis of the signals s 1  . . . s O , captured data dc 1  . . . dc N . 
     In particular, the monitoring system comprises an analyzer  102  able to determine, depending on the environmental signals s 1  . . . s O , one or more parameters of environmental contexts. In particular, the analyzer  102  identifies, depending on the environmental signals s 1  . . . s O , a number of sources of signals (source of audio and/or visual and/or haptic signals), and/or determines a position of one or more of the sources of signals, and/or an intensity of one or more of these sources of signals. 
     Optionally, the analyzer  102  comprises one or more elementary analyzers (not illustrated) that perform an analysis of signals of a given type (audio signal or video signal or haptic signal, etc.). In particular, the analyzer  102  comprises an aggregator (not illustrated) for integrating a plurality or even all of the captured data dc 1  . . . dc N  of a given type (audio, video or haptic) with a view to performing one or more processing operations. 
     The analyzer  102  especially comprises an identifier and/or locator (not illustrated) of sources of signals that receives captured data dc 1  . . . dc N , and especially captured data of a given type, or captured data of a plurality of given types, or aggregated captured data delivered by the aggregator of the analyzer  102 . Optionally, the analyzer  102  comprises an extractor (not illustrated) of per-source captured data, which delivers a signal corresponding to captured data originating from a given source (for example an identified source). The extractor of per-source captured data, which is also referred to as the source separator, may be coupled with voice recognition in order to allow various human sources to be recognized and/or coupled to a detector of specific sounds that recognizes the meaning of a sound and/or that compares a sound to sounds classed in a sound database (door opening/closing, oven beeping, identified machines (washing machine, dishwasher, microwave, etc.) starting/stopping, various water-related noises (faucet, shower, boiling, flush, etc.), glass breaking, barking, etc.). 
     The identifier and/or locator of sources is especially placed downstream of the per-source extractor. Furthermore, the analyzer  102  comprises a detector (not illustrated) of the environmental context able to identify an action of a source: door opening/closing, microwave beep signaling end of cooking, voice command of the user, etc. 
     In particular, the monitoring system  10  comprises a controller  103  that is able to control at least one visual physical indicator by setting one or more command parameters pcmd of one or more visual physical indicators  11   1 , . . . ,  11   V  depending on the detected environmental context, and/or on the identified source and/or on the position of the identified source, etc. Optionally, the controller  103  is also able to control a remote device  3  via a communication network  2  by means of a command cmd set depending on the detected environmental context and/or on the identified source and/or on the position of the identified source, etc. 
     In particular, a communication terminal, such as a smart phone or a tablet, for example implementing a voice assistant, implements the device for performing environmental analysis according to the invention. In this case, the visual physical indicator is especially a portion of the screen of the communication terminal. Optionally, this portion of the screen simulates the face of a living being. 
       FIG. 2  illustrates a simplified schematic of a method for performing environmental analysis according to the invention. 
     The method ENV_NLZ for performing environmental analysis implemented by an electronic device  1  for performing environmental analysis comprises:
         monitoring MNT an environment E in which the electronic device  1  for performing environmental analysis is placed,   generating a visual physical rendering DSPL depending on a command parameter pcmd resulting from the monitoring MNT of the environment.       

     In particular, the command parameter pcmd is determined on the basis of a portion of the data d O1  . . . d OJ  captured in the environment E, the portion of the captured data d O1  . . . d OJ  being relative to one data source O 1  . . . O J  in the environment E. 
     In particular, the monitoring MNT comprises
         capturing CPT 1  . . . CPT N  data from the environment, and   analyzing DC_NLZ the captured data dc 1  . . . dc N  to deliver the command parameter pcmd.       

     In particular, the method ENV_NLZ for performing environmental analysis comprises an operation of sending EM a notification ntf to a communication terminal  3 , the notification ntf being generated depending on the result of the analysis DC_NLZ of the captured data. 
     In particular, an environment E contains a plurality of sources O 1  . . . O J  of signals. The signals s 1  . . . s N  are, especially, received by the sensors CPT 1  . . . CPT N , which deliver captured data dc 1  . . . dc N . Optionally, an analysis DC_NLZ of the captured data processes the captured data delivered by the sensors CPT 1  . . . CPT N . 
     In particular, the analysis DC_NLZ of the captured data comprises a separator ST_DIV of captured data that separates the data depending on their type: audio data dcs 1  . . . dcs Ns , video data dcv 1  . . . dcv Nv , haptic data dct 1  . . . dct Nt , etc. 
     Optionally, the analysis DC_NLZ of the captured data comprises an aggregation C_AGGR of captured data, especially by type of captured data as illustrated in  FIG. 2 . The aggregation C_AGGR delivers aggregated captured data, for example aggregated audio data dcs as shown in  FIG. 2 . 
     In particular, the analysis DC_NLZ of the captured data comprises an operation of filtering SRD_FLT ambient noise, which delivers filtered captured data corresponding to the captured data from which data corresponding to ambient noise has been removed. Optionally, if at the time t the monitoring MNT leads to only noise being received, the operation of filtering SRD_FLT ambient noise will deliver no filtered captured data for this time and will stop STP the analysis DC_NLZ of the data captured at the time t, restarting only when further data are captured at the following time t+1. 
     In particular, the analysis DC_NLZ of the captured data comprises an operation of extracting O_XTR per-source data. The operation of extracting O_XTR per-source data is carried out either directly on all of the captured data dc={dc 1  . . . dc N }, or on all of the captured data of a given type dcv={dcv 1  . . . dcv Nv }, dcs={dcs 1  . . . dcs Ns }, dct={dct 1  . . . dct Nt }. The operating of extracting O_XTR data delivers per-source data d O1  . . . dc OJ , the captured data dcs O1  . . . dcs OJ  of which originate from a specific source, and, optionally, the (or the more than one) position(s) pos O1  . . . pos OJ  of the (or the more than one) source(s). 
     In particular, the analysis DC_NLZ of the captured data comprises a processing operation TRT, such as a detection of environmental context able to identify an action of a source: door opening/closing, microwaved beep signaling end of cooking, voice command of a user, etc. 
     In particular, the processing operation TRT allows one or more command parameters pcmd of a visual physical rendering DSPL to be determined depending on the detected environmental context, and/or on the identified source and/or on the position of the identified source, etc. Optionally, the processing operation is also able to set a command for a remote device  3 , which is controlled via a communication network  2  depending on the detected environmental context, and/or on the identified source and/or on the position of the identified source, etc. 
     In particular, the environmental analysis ENV_NLZ comprises at least one operation of generating NTF_GN a notification able to generate, depending on the command parameter, a notification ntf and a sending operation EM able to send the generated notification ntf from the electronic device  1  for performing environmental analysis to a controllable electronic device  3 . 
     In one particular embodiment, the method ENV_NLZ for performing environmental analysis is implemented in the form of a program comprising program-code instructions for executing the steps of a method for performing environmental analysis when said program is executed by a processor. 
       FIG. 3  illustrates a simplified schematic of one embodiment of a device for performing environmental analysis according to the invention. 
     The shape of the device  1  for performing environmental analysis is that of a cat&#39;s face. It comprises at least one audio sensor  101  and a plurality of visual physical indicators including two mini-screens  111   1   2  and  111   1   1  allowing eyes to be simulated, at least one moving part  111   3  allowing an ear to be simulated, and a matrix-array screen  111   2 . The matrix-array screen  111   2  especially allows a word of given length to be displayed. 
     In the case where the device  1  is also a smart speaker, it furthermore comprises at least one loud-speaker  17   1 ,  17   2 , and optionally a button  16 , such as an on/off button, allowing the device for performing environmental analysis and/or the smart speaker to be controlled. 
       FIG. 4  illustrates a simplified schematic of a communication architecture comprising a device for performing environmental analysis according to the invention. 
     The device  1  for performing environmental analysis is placed, or even located, in an environment E that it monitors, especially by capturing signals s. Optionally, the device  1  for performing environmental analysis is connected to a local network  2 D and/or to a remote network  2 W. Thus, the device  1  for performing environmental analysis delivers commands cmd or notifications ntf to a device (not illustrated) of the local network or of a remote device. In particular, the notifications ntf trigger access to exterior services (allowing SMS messages to be sent, the Internet or a communication device of the home network  2 D to be accessed, etc.). 
     Optionally, this connection to a network  2 D or  2 W allows the device  1  for performing environmental analysis to be updated upd. The commands of the update upd may be received directly from the remote communication network  2 W or received beforehand by a communication device of the local communication network  2 D then loaded onto the device  1  for performing environmental analysis. 
     Only the commands or notifications exit the local network  2 D, the signals s are not transmitted to the remote network  2 W. 
       FIG. 5  illustrates a simplified schematic of a device for performing environmental analysis comprising a sensor array according to the invention. 
     In order to cover the entirety of the environment E in which the device  1  for performing environmental analysis is placed it comprises an array of sensors  101   1  . . .  101   6 . In particular, the sensor array is an microphone array. 
       FIG. 6 a    illustrates a simplified schematic of a device for performing environmental analysis in a first exemplary monitoring state according to the invention. 
     In this first exemplary monitoring state, the analyzer  102  of the monitoring system  10  has detected a specific sound, this corresponding to a state of the monitoring system referred to as the “sound detected” state. The monitoring system  10  accordingly commands the visual physical indicator to simulate a facial attitude corresponding to that adopted when a sound is heard: in the present case by transmitting a command parameter that causes an eye with a slitted pupil to be simulated, and especially by indicating in the command parameter the type of simulated eye pcmd=ty(I). 
       FIG. 6 b    is a simplified schematic of a device for performing environmental analysis in a second exemplary monitoring state according to the invention. 
     In this second exemplary monitoring state, the monitoring system  10  is in standby or asleep, i.e. it is listening to the environment in which the device for performing environmental analysis is placed, in particular, it captures ambient sounds while waiting to detect a sound to be analyzed. The monitoring system  10  accordingly commands the visual physical indicator to simulate the facial attitude that corresponds to this standby state: in the present case by transmitting a command parameter that causes a closed eye to be simulated, and especially by indicating in the command parameter the type of simulated eye pcmd=ty(-). 
       FIG. 6 c    illustrates a simplified schematic of a device for performing environmental analysis in a third exemplary monitoring state according to the invention. 
     In this third exemplary monitoring state, the analyzer  102  of the monitoring system  10  has identified the type of sound detected, this corresponding to a state of the monitoring system referred to as the “sound being analyzed” state. The monitoring system  10  accordingly commands the visual physical indicator to simulate a facial attitude corresponding to that adopted when a sound has been identified/is being analyzed: in the present case by transmitting a command parameter that causes an eye with a round, counter-clockwise rotating or inwardly looking pupil to be simulated, and especially by indicating in the command parameter the type of simulated eye pcmd=ty(int). 
       FIG. 6 d    illustrates a simplified schematic of a device for performing environmental analysis in a fourth exemplary monitoring state and a first example of a monitoring result according to the invention. 
     In this fourth exemplary monitoring state, the analyzer  102  of the monitoring system  10  has identified the detected sound (by identifying its source and/or its category (opening/closing, beep, rain, etc.), this corresponding to a state of the monitoring system and to a first exemplary result referred to as the “sound identified” state/result. The monitoring system  10  accordingly commands the visual physical indicator to simulate a facial attitude corresponding to that adopted when the detected sound is known because identified: in the present case by transmitting a command parameter that causes an eye with a round pupil to be simulated, and especially by indicating in the command parameter the type of simulated eye pcmd 1 =ty(o). 
     Optionally, if the device  1  for performing environmental analysis comprises a matrix-array screen, it accordingly commands the visual physical indicator to render this identification: in the present case by transmitting a command parameter depending on a source of the identified sound or a category of the identified sound, pcmd 2 =id O  or pcmd 2 =ctg, respectively. 
       FIG. 6 e    illustrates a simplified schematic of a device for performing environmental analysis in a second example of a monitoring result according to the invention. 
     In this second example of a result, the analyzer  102  of the monitoring system  10  has been unable to identify any information regarding the detected sound (neither its identification, nor its category, nor its position, etc.), this corresponding to a second exemplary result referred to as the “incomprehension” result. The monitoring system  10  accordingly commands the visual physical indicator to simulate a facial attitude corresponding to that adopted when the detected sound is not understood: in the present case by transmitting a command parameter that causes an eye with a cross-shaped pupil to be simulated, and especially by indicating in the command parameter the type of simulated eye pcmd=ty(x). 
       FIG. 6 f    illustrates a simplified schematic of a device for performing environmental analysis in a third example of a monitoring result according to the invention. 
     In this third example of a result, the analyzer  102  of the monitoring system  10  has identified the position of the source of the detected sound, this corresponding to a third exemplary result referred to as the “direction of audio source” result. The monitoring system  10  accordingly commands the visual physical indicator to simulate a facial attitude corresponding to that adopted when a sound is heard to come from a given direction: in the present case by transmitting a command parameter that causes an eye directed toward this source to be simulated, and especially by indicating in the command parameter the position of the pupil of the simulated eye pcmd=pos(r). 
       FIG. 6 f    may also illustrate a simplified schematic of a device for performing environmental analysis in one example of a direction of focus of monitoring according to the invention. 
     In this example of a monitoring direction, the analyzer  102  of the monitoring system  10  identifies the direction in which the monitoring system is focusing its attention. The monitoring system  10  accordingly commands the visual physical indicator to simulate a facial attitude corresponding to the given monitoring direction: in the present case by transmitting a command parameter that causes an eye directed in the monitoring direction to be simulated, and especially by indicating in the command parameter the position of the pupil of the simulated eye pcmd=pos(r). 
     Optionally, to distinguish between the monitoring direction and the direction of a detected sound, the command parameter, for a given simulated-eye position, will specify a different shape depending on the action of the analysis-performing device: monitoring or detected sound. For example, the simulated eye will take the form of a vertically slitted eye in the case of monitoring and of a simulated eye of the pupil of which is round in the case of a detected sound. 
       FIG. 6 g    illustrates a simplified schematic of a device for performing environmental analysis in an exemplary state of the analyzing device according to the invention. 
     In this exemplary state of the analysis-performing device, the device for performing environmental analysis is in the process of activating, especially following a press by the user on an on/off button  16  or a voice-activation command, etc. The monitoring system  10  accordingly commands the visual physical indicator to simulate a facial attitude corresponding to that adopted when it wakes up: in the present case by transmitting a command parameter that causes a downward-directed eye to be simulated, and especially by indicating in the command parameter the position of the pupil of the simulated eye pcmd=pos(d). 
       FIGS. 6 a  to 6 g    illustrate a device  1  for performing environmental analysis simulating the face of a cat. Generally, it may simulate the face of any animal, human being or virtual being. The device  1  for performing environmental analysis then functions in a way analogous to the behavior of this living being: the visual physical indicator simulating one or more eyes simulates the focus of the gaze on the person who is speaking; if there are more than one people in conversation in the environment E, the visual physical indicator simulating one or more eyes simulates the gaze passing from one person to the next depending on who is currently speaking; if a noise/a new sound is detected, the visual physical indicator simulating one or more eyes simulates the gaze turning toward this noise. The interface  11  indicates focus by the monitoring system  10  on a specific source, whether audio or of another type, human or of another type, etc., being analyzed by the monitoring system  10  and/or processed by the monitoring system with a view to commanding a third-party device  3  and/or forming the subject of a request by a voice assistant  6  (see  FIG. 7 ) implementing the monitoring system  11 ,  611 . The interface  11  embodies this focus, which indicates to the users present in the environment E the source that is currently being processed by the monitoring system  11  and/or the voice assistant  6 , even though the monitoring system continues to monitor all of the environment E. This monitoring task (or audio surveillance in the case where audio is monitored) is clearly understandable to humans, who consider it merely to be one of vigilance involving neither understanding nor identification of the various audio sources present in parallel with the source on which the device  1  for performing environmental analysis and/or the voice assistant is focused. Thus, users perceive only that the machine: the device  1  for performing environmental analysis and/or the voice assistant  6 , is not listening to “everything”, which should improve confidence in and acceptance of these types of device, smart speakers in particular. 
       FIG. 7  illustrates a simplified schematic of a voice assistant according to the invention. 
     A voice assistant  6  connected to a communication network  2 W allows at least one service performed by a communication device  4  of the communication network to be controlled, the voice speaker comprising:
         a system  610  for monitoring an environment E in which the voice assistant  6  is placed, and   a visual physical indicator  611  controlled depending on at least one command parameter pcmd delivered by the monitoring system  610 .       

     In particular, the voice assistant  6  comprises a device  61  for performing environmental analysis, which implements the monitoring system  610  and the visual physical indicator  611 . 
     Thus, when a user U present in the environment E addresses a voice command v_cmd to the voice assistant  6 , the monitoring system  610  captures this voice command v_cmd with the ambient sounds of the environment E in an audio signal s and controls the visual physical indicator  611  in order to simulate a facial attitude identifying the source, especially by directing the eyes simulated by this visual physical indicator  611  toward the user U, once the monitoring system  610  has identified the position of a voice-command source in the received signal s. 
     In parallel, the voice assistant processes the voice command identified in the received signal s. In particular, the monitoring system  610  transmits the filtered captured data dcf corresponding to the voice command identified in the received signal s to a request generator  62 . The request generator  62  integrates into a request intended for a communication device  4 , especially a service-performing device, the identified command either directly (by integrating the command in voice format) or indirectly by integrating a command depending on the identified voice command (especially defined by performing voice recognition on the received voice command and optionally by converting the recognized natural-language command into a text command formatted depending on the language of the request). 
     In particular, the voice assistant  6  comprises a transmitter  65  that sends the identified command to a communication device  4 , especially a service-performing device, either directly the command dcf delivered by the monitoring system  610 , or a request req generated by a request generator  62  and comprising the identified command dcf. 
     In particular, the communication device  4  sends a reply answ to the request req, dcf. The transmitter  65  receives this reply answ and transmits it to a rendering device  66 . In particular, the rendering device  66  is a voice-rendering device. In this case, either the reply answ sent by the communication device  4  comprises a reply in voice format, or the rendering device  66  comprises a voice synthesizer (not illustrated) that converts the received reply answ into voice format before rendering it. In particular, the voice-rendering device  66  comprises one or more loudspeakers such as the loudspeakers  17   1  and  17   2  of the device  1  for performing environmental analysis of  FIG. 3 . 
     Optionally, the monitoring system  610  commands cmd in parallel a communication device  3  of a local network  2 D as illustrated in  FIG. 7  or of a remote network  2 W. The communication device  3  is especially a communication device of a home-automation apparatus (control center, shutter, window/door shutting system, heating, lighting, etc.), a communication device of a multimedia apparatus (smart TV, TV decoder, recorder, etc.), a connected object, etc. 
     In summary, the one or more microphones of the monitoring system  610  capture an ambience s and give, by means of the invention, feedback to the people present in the environment E, who include the user U, so as to explain what it can hear/is listening to, which was previously not the case with voice assistants. 
     Thus, the dialogue between the user and the voice assistant  6  is encouraged by the addition of the modality for performing environmental analysis, this modality being implemented by the monitoring system  610  combined with the visual physical indicator  611 . Use with the physical indicator  611  simulating a face of a living being of a morphological interaction further decreases the discomfort of interaction with a machine: the voice assistant  6 . 
       FIG. 8  illustrates a simplified schematic of a voice-assistance method according to the invention. 
     A voice-assistance method V_ASS implemented by a communication terminal connected to a communication network, comprising controlling SV_PLT at least one service performed by a communication device of the communication network other than the communication terminal, the voice-assistance method comprising:
         monitoring MNT an environment E in which the communication terminal is placed,   generating a visual physical rendering DSPL depending on a command parameter pcmd resulting from the analysis of the captured data.       

     In particular, the voice-assistance method V_ASS comprises an environmental analysis ENV_NLZ employing the monitoring MNT and visual physical rendering DSPL. 
     Thus, when a user U present in the environment E addresses a voice command v_cmd to the voice assistance V_ASS. The monitoring MNT captures this voice command v_cmd with the ambient sounds of the environment E in an audio signal s and commands the visual physical rendering DSPL in order to simulate a facial attitude identifying the source. 
     In parallel, the voice assistance V_ASS processes the voice command identified in the received signal s. In particular, the monitoring MNT transmits the filtered captured data dcf corresponding to the voice command identified in the received signal s to a request generation REQ_GN. The request generation REQ_GN integrates, into a request intended for a communication device  4 , especially a service-performing device, the identified command either directly (by integrating the command in voice format) or indirectly by integrating a command depending on the identified voice command (especially defined by performing voice recognition on the received voice command and optionally by converting the recognized natural-language command into a text command formatted depending on the language of the request). 
     In particular, the service control SV_PLT comprises extracting V_XTR the voice command from the filtered captured data dcf containing it. Optionally, the service control SV_PLT comprises voice recognition V_RCG that converts the voice command into a natural-language text command. 
     In particular, the voice assistance V_ASS comprises a transmission TR that sends the identified command c to a communication device  4 , especially a service-performing device, either directly the command dcf delivered by the monitoring MNT, or the extracted command v_cmd x , or the recognized command v_cmd c , or a request req generated by a request generation REQ_GN and comprising the identified command dcf, or the extracted command v_cmd x , or the recognized command v_cmd c . 
     In particular, the communication device  4  sends a reply answ to the request req. The reception REC receives this reply answ and delivers it to a rendition SYNT. In particular, the rendition SYNT is a voice rendition. In this case, either the reply answ sent by the communication device  4  comprises a reply in voice format, or the rendition comprises a voice synthesizer (not illustrated) that converts the received reply answ into voice format before rendering it. 
     Optionally, the monitoring MNT commands cmd in parallel a communication device  3  of a communication network. Where appropriate, the communication device  3  may send in return an acknowledgement of receipt of the command or an acknowledgement of execution of the command ack. The reception REC receives this acknowledgement ack and delivers a rendition SYNT thereof. In the case where the rendition is a voice rendition, either the acknowledgement ack sent by the communication device  3  is in voice format, or the rendition comprises a voice synthesizer (not illustrated) that converts the received acknowledgement ack into voice format before rendering it. 
     In one particular embodiment, the method ENV_NLZ for performing environmental analysis is implemented in the form of a program containing program-code instructions for executing steps of the voice-assistance method when said program is executed by a processor. 
     The invention also relates to a medium. The data medium may be any entity or device capable of storing the program. For example, the medium may comprise a storage means, such as a ROM, for example a CD-ROM or a microelectronic circuit ROM, or else a magnetic recording means, for example a floppy disk or a hard disk. 
     Moreover, the data medium may be a transmissible medium such as an electrical or optical signal that may be conveyed via an electrical or optical cable, by radio or by other means. The program according to the invention may in particular be downloaded over a network, in particular the Internet. 
     Alternatively, the data medium may be an integrated circuit into which the program is incorporated, the circuit being suitable for executing or being used in the execution of the method in question. 
     In another implementation, the invention is implemented by way of software and/or hardware components. With this in mind, the term module may correspond either to a software component or to a hardware component. A software component corresponds to one or more computer programs, one or more subroutines of a program or, more generally, to any element of a program or of software package that is able to implement a function or a set of functions in accordance with the above description. A hardware component corresponds to any element of a hardware assembly that is able to implement a function or a set of functions.