Patent Publication Number: US-2017370974-A1

Title: Method and system for providing sound data for generation of audible notification relating to power consumption

Description:
TECHNICAL FIELD 
     The present disclosure relates to the field of monitoring systems for monitoring power consumption. In particular, a method and a system for providing sound data for generation of an audible notification relating to power consumption at a site are disclosed. A corresponding computer program and a carrier therefor are also disclosed. 
     BACKGROUND 
     Within the field of monitoring systems for monitoring power consumption, an International Energy Agency (IEA) regularly provides statistics about trends and amounts of power consumption, such as electrical power consumption. Statistics, from the IEA available in the fall of 2014, reveals that there has been an increase in average power consumption per capita of 18.75% in the last decade. At the same time, price of electricity in developed parts of the world has increased. In the United States (US), the price of electricity has increased by 50% from 2003 to 2014, and in Europe, the price of electricity has increased by 17% from 2009 to 2014. 
     Consumers, including households, industries, organizations and the like, begin to care more and more about power consumption, due to economic and/or environmental reasons. 
     There are quite many tools for power consumption data analysis and visualization, available on the market today. These tools include capabilities for visualization on both the web and/or on mobile devices. 
     Furthermore, it is known that when surveyed consumers receive feedback about their power consumption, it may have an effect of a 5-20% reduction of the power consumption. The exact reduction of the power consumption may depend on type of the feedback, population and survey characteristics. In many cases, a real-time feedback to the consumers in a detailed manner, such as power consumption on a per device basis, has greater gains than more general feedback. 
     A known tool for providing feedback about power consumption and visualization of the feedback may for example show a graph to indicate a current level of power consumption. Furthermore, the known tool may provide basic feedback in the form of a notification message that is displayed when a value is below or above a threshold. 
     Although, the tools that visualize power consumption have a perceived value of power consumption awareness for their users, the tools are not always convenient or even possible to use. A disadvantage is that the users need to pay attention, e.g. by looking at a screen of a visualization and feedback tool for power consumption awareness. 
     SUMMARY 
     An object is to provide an improved system for providing feedback of power consumption, which system may be a tool of the above mentioned kind. 
     According to an aspect, the object is achieved by a method, performed by a system, for providing sound data for generation of an audible notification relating to power consumption at a site. The system receives information about power consumption at the site. The system determines the sound data based on the information about power consumption and on preference of a user of the system. 
     According to another aspect, the object is achieved by a system configured to provide sound data for generation of an audible notification relating to power consumption at a site. The system is configured to receive information about power consumption at the site. Moreover, the system is configured to determine the sound data based on the information about power consumption and on preference of a user of the system. 
     With the embodiments herein, there is provided a system which enables improved feedback capabilities for generation of the audible notification relating to power consumption, e.g. a measurement of current power consumption. The currently measured power consumption may be received in the form of the information about power consumption at the site. Thanks to that the sound data is based on the preference of the user, the user will more easily pay attention to the audible notification. In one exemplifying example, the user may be reluctant to pay attention to and note whether the power consumption increases or decreases if the user is required to observe a graph on a screen. Instead, according to some embodiments herein, the user may easily recognize that a volume of the user&#39;s choice of music increases or decreases as power consumption increases or decreases, respectively. Accordingly, the system facilitates how users may become aware of power consumption by enabling audible feedback according to the preference of the user, i.e. personalized and audible feedback is enabled. 
     An advantage is that the sound data enable provision of instant feedback of power consumption to the user, i.e. there may become a change in the audible notification upon when the user performs an action that affects the current power consumption. 
     Another advantage is that the system does not require visual attention of the user. Audio attention may, however, to some extent be preferred, but since the audible notification is based on the user&#39;s preference, such audio attention may be pleasant and non-intrusive to the user. The audio attention may be said to be non-intrusive, since the user may have selected an audible notification that is enjoyed and appreciated by the user. 
     Furthermore, the system may co-exist with existing power installations and devices. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The various aspects of embodiments disclosed herein, including particular features and advantages thereof, will be readily understood from the following detailed description and the accompanying drawings, in which: 
         FIG. 1  is a schematic overview of a structure in which embodiments herein may be implemented, 
         FIG. 2  is a diagram illustrating an exemplifying graph of power consumption versus time, 
         FIG. 3  is a flowchart illustrating embodiments of the method in the system, 
         FIG. 4  is a block diagram illustrating an exemplifying system, and 
         FIG. 5  is a block diagram illustrating embodiments of the system. 
     
    
    
     DETAILED DESCRIPTION 
     Throughout the following description similar reference numerals have been used to denote similar features, such as actions, steps, nodes, elements, units, modules, circuits, parts, items or the like, when applicable. In the Figures, features that appear in some embodiments are indicated by dashed lines. 
       FIG. 1  depicts an exemplifying structure  100  in which embodiments herein may be implemented. 
     The structure  100  includes a system  110  for providing sound data for generation of the audible notification according to the embodiments herein and a site  120 . 
     The sound data may be any representation of the audible notification that may be stored in a computer, such as the system  110 . This means that the sound data may be a wav-, mpg3-, au-, flac-, ogg-, raw, acc-, aiff-, ra-, midi-, wma-file or the like. 
     The system  110  may communicate  132  with, such as send to, a speaker device  130 , such as a load speaker, a headset or the like. In this example, the speaker device  130  may be connected to the system  110  via a wired or wireless audio connection, which connection is only capable of transferring audio related information, e.g. the audio data itself and possible some few control commands like ‘play’, ‘pause’, ‘skip’, etc. In other examples, the system  110  may include means (not shown) for generating the audible notification. The means may be any kind of means for generating sounds, such as speakers, headphones or the like. 
     The site  120 , such as a house, an industry, a building, a train, an airplane or the like, may be defined by that a user or a group of users affects power consumption at the site  120  by which activities the user, or the group of users, performs. The site may include one or more appliances, such as dishwashers, vacuum cleaners, fridges, freezers, irons and the like. 
     The site  120  may be associated with one or more power meters, which may measure power consumption of appliances of the site. A power meter may measure the power consumption of one individual appliance or the power consumption of a group of appliances. 
     The system  110  may send and receive  121 , e.g. via a wired or wireless connection, information to/from the site  120 . The information may include measurements about current power consumption at the site. 
     The structure  100  may also comprise an electronic device  140 , such as a user equipment, a machine-to-machine (M2M) device, a mobile phone, a cellular phone, a Personal Digital Assistant (PDA) equipped with radio communication capabilities, a smartphone, a laptop or Personal Computer (PC) equipped with an internal or external mobile broadband modem, a tablet PC with radio communication capabilities, a portable electronic radio communication device, a home automation system, a home audio system, a CD player, an MP3 player or the like. 
     The electronic device  140  may communicate  142  via a telecommunication network  101  with the system  110 . Thus, the electronic device  140  may e.g. send information to the system  110 . The telecommunication network  101  may be a wired or wireless network, such as a landline telecommunication network, public switched network, a Third Generation Partnership Project (3GPP) network, a Long Term Evolution (LTE) network, a Global System for Mobile Communications (GSM) network, a Universal Mobile Telecommunication System (UMTS) network, a Worldwide Interoperability for Microwave Access (WiMAX) network, a wireless network from among the 802.11-standard suit of networks or the like. 
     The structure  100  may also comprise a music provider  150 , such as server hosting a music service like Spotify, Wiimp, LastFM, Pandora Radio, iTunes Radio or the like. The music provider  150  may communicate  151 , e.g. via a wired or wireless connection, with the system  110 . 
     In order to better appreciate the description of the embodiments herein, it is here provided a brief explanation of how sound data may be determined based on power consumption. Thus,  FIG. 2  shows an exemplifying a graph representing a sequence of measurements of power consumption as a function of time. 
     If the graph in  FIG. 2  is treated as a sound wave plot, possibly after certain conversion or mapping, power consumption can be turned into an audible notification. This process is referred to as sonification herein. 
     It won&#39;t be very pleasant to listen to the audible notification with exactly the same graph as in  FIG. 2  because it may a representation of noise. However, by applying sound wave matching, music with similar section as the graph can be found, and that music can be played on the phone, the home audio system, etc. Sound matching is a well-known in the art and will not be elaborated here for sake of simplicity. Theoretically, another exemplifying power consumption graph will result in another piece of music. 
       FIG. 3  illustrates an exemplifying method according to embodiments herein when performed in connection with the structure  100  of  FIG. 1 . The system  110  performs a method for providing sound data for generation of an audible notification relating to power consumption at the site  120 . 
     As mentioned, the site  120  may comprise a set of electrical appliances of a house, an office, an industry or a building or part thereof. This means that the electrical appliances may be located in-doors or in proximity of the site, e.g. outside but still associated to the site. When an electrical appliance is located outside the site, the user&#39;s actions still affect the power consumption of the electrical appliance. 
     One or more of the following actions may be performed in any suitable order. 
     Action  301   
     The system  110  receives information about power consumption at the site  120 . As an example, the system  110  may receive one or more points to build a graph, such as the exemplifying graph in  FIG. 2 . Each point may be associated to a value indicating power consumption and a point in time. Possibly, the point may be associated to a certain power meter if more than one power meter may provide data about power consumption to the system  110 . 
     The information may be received, denoted  121  in  FIG. 1 , from the site  120 . The information may be sent by one or more power meters at the site  120 , by a node collecting information about power consumption from power meters at the site  120  or the like. The site  120  may thus include said one or more power meters, the node collecting information or a similar entity. 
     Action  302   
     The system  110  determines the sound data based on the information about power consumption and on preference of a user of the system  110 . The audible notification may be audible to said user. 
     The preference of the user may be expressed in many different manners. 
     The preference of the user may relate to volume of the audible notification in relation to the power consumption. This means that the power consumption may be treated volume of the audible notification. Therefore, the audible notification, such as music, may get louder when power consumption increases and vice versa. More expressed, the volume of the audible notification may be set relatively a current volume, or at absolute values of the volume in relation to the power consumption. 
     In one example, an increase of the volume may correspond to an increase of the power consumption and a decrease of the volume may correspond to a decrease of the power consumption, in absolute values or relatively a current volume setting of the audible notification. Accordingly, higher volume means higher power consumption. In other examples, it may be the opposite, i.e. higher volume may correspond to lower power consumption. 
     In another example, the user may predefine a set of sound data, e.g. a couple of music clips, to play when power consumption reaches different thresholds, shown as following table: 
                                         Power consumption   Sound clip                      &lt;100 w   1.wav           &gt;= 100 w &lt;500 w   2.wav           &gt;= 500 w   3.wav                    
This means that a sound clip as selected by the user is played when power consumption currently is within a certain interval.
 
     Each of the sound clips, as example of sound data, may be indicated by a respective indication. Hence, the preference of the user may include a set of indications associated to a respective level of the power consumption. Each indication may indicate a respective sound data, or sound clip, for generation of the audible notification. 
     Accordingly, the sound data may be represented by an indication associated with the sound data. In more detail, the system  110  may send a configuration command, which carries the indication, such as an integer or other value. It may then be that the system  110  and the electronic device  140  both are aware of that the integer represents certain sound data, e.g. by negotiation between the system  110  and the electronic device  140  or by (pre-)configuration of system  110  and the electronic device  140 . 
     In further examples, the sound data may represent a piece of music. As a consequence, the audible notification may also comprise the piece of music. 
     The music may be computer-generated music, e.g. generated by an algorithm, using different frequency and/or amplitude in the generated sound waves, or sound data, to signify events such as peak power consumption. 
     The user of the system may customize the sound data by changing some of parameter, like a “Electronic-like” or a “More dissonant” option. As an example, this website http://computoser.com, retrieved on 6 Oct. 2014, runs this kind of algorithm as service generating music. 
     The music may be selected by the user. For example, the music may include a favourite song of the user. 
     As an additional example, the preference of the user may relate to pace of the audible notification in relation to the power consumption. The pace of the audible notification may be set relatively a current pace, or at absolute values of the pace in relation to the power consumption. 
     This means that the power consumption may e.g. be tied to the tempo, or pace, of the music. Additionally, if the power consumption peaks the system  110  may e.g. swap mood of the music from Major to Minor. 
     In a typical example, the pace of the sound data, i.e. the audible notification when generated, increases when power consumption increases. This is particularly applicable when the sound data represents the piece of music. 
     According to yet another example, the preference of the user may relate to number of instruments of the audible notification in relation to the power consumption. The number of instruments of the audible notification may be set relatively a current number of instruments, or to absolute numbers in relation to the power consumption. In more detail, a new instrument may for example be inserted in a mix of the music represented by the sound data. When combining this example one of the examples above, the sound data represent music selected by the user, such as a favourite song. 
     According to a still further example, a type of an instrument reflects the power consumption. The instrument is of course one of the instruments that are present in the sound data representing the audible notification. In more detail, this means that the preference of the user may relate to type of instrument of the audible notification in relation to the power consumption. The type of instrument of the audible notification may be set in relation to the power consumption. Types of instrument may be drum, violin, piano, cello, oboe, clarinet, chimes, etc. Hence, typically the drum may be used to represent high power consumption whereas for example the violin may be used to represent low power consumption. 
     Moreover, the preference of the user may relate to type of instrument of the audible notification in relation to power consumption of an appliance associated to the type of instrument. This means that the site may be equipped with a power meter for each appliance that one wishes to represent with a certain type of instrument. For example, a dishwasher may be associated to a first type of instrument, such as cello, and a coffee machine may be associated to a second type of instrument, such as a flute. In short, each appliance is associated to a respective instrument. 
     The information about power consumption may in some cases be analysed in order to distinguish power consumption of one or more individual appliances. An analysing technique is often referred to as a disaggregation technique, which is known in the art. The disaggregation technique is used to identify an active appliance/device in the site  120 , such as a home, only by measuring a total power consumption and by learning individual power consumption patterns for each appliance of the site  120 . Then the user may assign an instrument to a few of energy-hungry appliances/devices, e.g. a guitar to a refrigerator, and multiple instruments could be playing together. A human ear has the ability to distinguish different instruments by listening all of them to play at once because sounds have different timbre. Since different instruments playing totally different songs may result to a bad experience this embodiment could assign a different appliance to a different instrument of a musical score or a DJ mix that includes multiple instruments or tracks. Then, the volume of a certain instrument could be modulated by its power consumption. As a result the home owner could distinguish the level or severity in power consumption for multiple devices/appliances simultaneously. 
     Thus, it is not necessary that the site includes one power meter for each appliance of the site. Accordingly, the examples given in this paragraph may be applied even with only one power meter at the site. 
     Furthermore, the above mentioned example may be combined with the example in which the volume of the audible notification is indicative of the power consumption. Hence, a volume of the type of instrument associated to the appliance may be set relatively a current volume, or at absolute values of the volume in relation to the power consumption of the appliance. Expressed differently, volume of different instruments, reflect power consumption of particular appliance. 
     Moreover, the preference of the user may relate to a list of favourite songs, which list may be received, denoted  151  in  FIG. 1 , from the music provider  150 . In an example, one song from the list is randomly picked by the system  110 . That song may then be represented in the form of the sound data. 
     A few combinations of the examples are given above. Further combinations of the examples may be realized, each combination having its own particular advantages. 
     Action  303   
     According to an embodiment, the system  110  may generate visualization data based on the information about power consumption and preference of a user of the system  110 . The visualization data may represent a visualization relating to the power consumption. 
     Accordingly, the audible notification is combined with a user preferred visualization in order to provide a both audible and visual notification of the power consumption. In this manner, the user may at easy pay attention to the information about power consumption. Thus, a user-friendly and attractive, both in terms of audibility and visualization, interface for providing information about the power consumption at the site is provided. 
     Action  303  may be performed before or after one or more of actions  304  and  305  below. 
     Action  304   
     As mentioned above, the system  110  may include means, such as a speaker, for generation of the audible notification. In these examples, the system  110  may generate the audible notification based on the sound data. In this manner, the sound data is rendered audible to a user of the system  110 . 
     Action  305   
     The system  110  may send the sound data to a further means (not shown) for generating the audible notification. The further means may be the speaker device  130 ,  131 . The sending of the sound data to the further means may preferably be performed as an alternative to action  304  described above, i.e. when action  304  is not performed. However, action  305  may also be performed in combination with action  304 , either before or after action  304 . 
     In a first embodiment, the electronic device  140  is located outside the site  120 . Furthermore, the electronic device  140  may comprise the speaker device  131 . The sending is then performed by sending the sound data via the telecommunication network  101 . Thus, remote notification of the power consumption is enabled. A home owner, as an example of the user, may connect the system  110  with an application on a connected device, e.g. a mobile phone, that plays music and while listening to the music the home owner may receive auditory feedback about the power consumption at the site  120 , e.g. the home, periodically or in response to fault situations. The user could hence receive the audible notification even when not present at the site  120 . See also communication  142  in  FIG. 1 . 
     In a second embodiment, the speaker device  130  may be connected to the system  110  by means of connection adapted for transferring of the sound data and data related to the sound data. See also communication  132  in  FIG. 1 . 
     In an office environment, as an exemplifying site, the first case may be preferred since users in the office may have different preferences. With the first case, the electronic device is provided with headphones which are carried by the users. 
     In an industry environment, as an exemplifying site, generation of audible notifications in the form of music may not be allowed or welcome. Therefore, the embodiments in which predefined sound waves, such as alarm clips, may be preferred. These predefined sound waves may be generated, or played, and altered to reflect current power consumption according to the embodiments herein. 
     In a further embodiment, the site  120  may be divided into sections, such as rooms, spaces, floors, stories or the like. The system  110  may have knowledge about which appliances are associated to which section. The system  110  may also keep track of power consumption of these appliances. In this embodiment, the system  110  may further keep track of, e.g. by means of that the electronic device  140  reports its position to the system  110 , in which section the electronic device  140  currently is located. By combining a current section, in which the electronic device  140  is present at the moment, and the knowledge about which appliances are in that section and their associated power consumption, the system  110  may provide sound data, reflecting the power consumption of the appliances in the current section. 
     The system  110  is based on sonification of power consumption while taking the preference of the user into account. The system  110  produces sound data of different amplitude and frequency, which sound data represents audible sounds, to indicate changes in power consumption triggered from a user action. The generated sound data is adapted to the preference of the user. 
     In this manner, information about power consumption is utilized to retrieve, remix or generate sound data to make users aware of power consumption at the site in an audible way. 
       FIG. 4  illustrates an example of the system  110 . This example is provided purely for illustrative purposes. As shown in  FIG. 5  below, various realizations of the system  110  are provided herein. 
     In this example however, the system  110  comprises several logical modules: a power meter A, a power consumption monitor module B, an audible notification module C, an audio output D, a user preference module F and an optional module: a music provider E. Notably, the system  110  need not comprise the power meter A and the audio output D. 
     The different modules do in this example not represent physical devices. A single module may be distributed across multiple physical devices, as well as multiple modules being located in one physical device. 
     The power meter A is configured to provide information about the power consumption at the site, e.g. an electrical network that is monitored. The power meter A may be a pre-existing meter that the system  110  interfaces against, or one that is installed as part of the system  110 . The power meter A may also be assumed that it is equipped with a processor to perform disaggregation of the total power consumption to individual device/appliance power consumption. An alternative may be to include power meters on each of the most energy consuming devices and those power meters would report to one central place locally in at the site, such as a home or office environment. Then, in a similar way as with only one power meter, the individual device/appliance power consumption may be collected in one place. 
     The power consumption monitor module B is configured to collect data from the power meter, the disaggregation module or the individual appliance power meters and compiles it in a way that is useful to the audible notification module C. The power consumption data may be used in many different ways as described above. The audible notification module C in turn uses the compiled data to determine what should be sent to the audio output D. 
     Some embodiments require a source of music, which in that case is provided by the music provider E. The music provider E may be a music service such as Spotify or some other source of music, e.g. music stored directly on a connected permanent storage media or accessed via a network connection. 
     The preference module F is configured to provide an interface where parameters to the system  110  may be configured. The preference module F may e.g. be used to set the volume of the audio output or select a list of songs or any other parameters required by the possible embodiments herein. 
     In an embodiment, the preference module F may be a physical device where the user can configure the system  110  using e.g. a touchscreen, voice input, or any other form of User Interface (UI). 
     In another embodiment, the preference module may be accessible via a network, e.g. a web server serving a web page or providing an Application Programming Interface (API). These two embodiments may also be combined into a device with a UI that also is accessible via the network. 
     In another embodiment, a separate system may be added that renders the power consumption in some other form, e.g. visualization. The separate system may be connected either to the power meter A or power consumption monitor module B. The preference module F may then also have the role of selecting which system should be used. 
     Schematically,  FIG. 4  includes:
         A. Power meter: a device which provides information about the total power use or individual device/appliance power use if it performs disaggregation   B. Power consumption monitor module: Compiles the information from the power meter or individual device/appliance power meters in a way that is more practical for the audible notification module   C. Audible notification module: Controls the playback of the audio using the information provided by the power consumption monitor module   D. Audio output: Used for audio playback, e.g. speakers.   E. Music provider: A service that provides a selection of music   F. User preferences module: Provides an interface for customization of the system.       

     With reference to  FIG. 5 , a schematic block diagram of embodiments of the system  110  of  FIG. 1  is shown. The system  110  is thus configured to provide sound data for generation of an audible notification relating to power consumption at a site  120 . 
     The system  110  may comprise a processing module  501 , such as a means, one or more hardware modules and/or one or more software modules for performing the methods described herein. 
     The system  110  may further comprise a memory  502 . The memory may comprise, such as contain or store, a computer program  503 . 
     According to some embodiments herein, the processing module  501  comprises, e.g. ‘is embodied in the form of’ or ‘realized by’, a processing circuit  504  as an exemplifying hardware module. In these embodiments, the memory  502  may comprise the computer program  503 , comprising computer readable code units executable by the processing circuit  504 , whereby the system  110  is operative to perform the methods of  FIG. 3 . 
     In some other embodiments, the computer readable code units may cause the system  110  to perform the method according to  FIG. 3  when the computer readable code units are executed by the system  110 . 
       FIG. 5  further illustrates a carrier  505 , comprising the computer program  503  as described directly above. The carrier  505  may be one of an electronic signal, an optical signal, a radio signal, and a computer readable medium. 
     In some embodiments, the processing module  501  comprises an Input/Output unit  506 , which may be exemplified by a receiving module and/or a sending module as described below when applicable. 
     In further embodiments, the processing module  501  may comprise one or more of a receiving module  510 , a determining module  520 , a generating module  530  and a sending module  540  as exemplifying hardware modules. In other examples, one or more of the aforementioned exemplifying hardware modules may be implemented as one or more software modules. 
     Therefore, according to the various embodiments described above, the system  110  is operative to and/or the system  110 , the processing module  501  and/or the receiving module  510  is configured to receive information about power consumption at the site  120 . 
     The system  110  is further operative to and/or the system  110 , the processing module  501  and/or the determining module  520  is further configured to determine the sound data based on the information about power consumption and on preference of a user of the system  110 . 
     Moreover, the system  110  may be operative to and/or the system  110 , the processing module  501  and/or the generating module  530  may be configured to generate the audible notification based on the sound data, whereby the sound data may be rendered audible to a user of the system  110 . 
     Furthermore, the system  110  may be operative to and/or the system  110 , the processing module  501  and/or the sending module  540  may be configured to send the sound data to a speaker device  131 , whereby the speaker device  120  may be capable of generating the audible notification based on the sound data. 
     An electronic device  140 , located outside the site  120 , may comprise the speaker device  131 , wherein the system  110  may be configured to send the sound data via a telecommunication network  101 . 
     The speaker device  131  may be connected to the system  110  by means of connection adapted for transferring of the sound data and data related to the sound data. 
     The system  110  may further be operative to and/or the system  110 , the processing module  501  and/or the generating module  530  may further be configured to generate visualization data based on the information about power consumption and preference of a user of the system  110 , wherein the visualization data may represent a visualization relating to the power consumption. 
     According to the embodiments described herein, the follow embodiments of the system  110  are provided. 
     The preference of the user may relate to volume of the audible notification in relation to the power consumption, wherein the volume of the audible notification may be set relatively a current volume, or at absolute values of the volume in relation to the power consumption. 
     An increase of the volume may correspond to an increase of the power consumption and a decrease of the volume may correspond to a decrease of the power consumption, in absolute values or relatively a current volume setting of the audible notification. 
     The preference of the user may include a set of indications associated to a respective level of the power consumption, wherein each indication may indicate a respective sound data for generation of the audible notification. 
     The audible notification may comprise a piece of music. 
     The preference of the user may relate to pace of the audible notification in relation to the power consumption, wherein the pace of the audible notification may be set relatively a current pace, or at absolute values of the pace in relation to the power consumption. 
     The preference of the user may relate to number of instruments of the audible notification in relation to the power consumption, wherein the number of instruments of the audible notification may be set relatively a current number of instruments, or to absolute numbers in relation to the power consumption. 
     The preference of the user may relate to type of instrument of the audible notification in relation to the power consumption, wherein the type of instrument of the audible notification may be set in relation to the power consumption. 
     The preference of the user may relate to type of instrument of the audible notification in relation to power consumption of an appliance associated to the type of instrument. 
     A volume of the type of instrument associated to the appliance may be set relatively a current volume, or at absolute values of the volume in relation to the power consumption of the appliance. 
     The site  120  may comprise a set of electrical appliances of a house, an office, an industry or a building or part thereof. 
     The audible notification may be audible to said user. 
     As used herein, the term “processing module” may include one or more hardware modules, one or more software modules or a combination thereof. Any such module, be it a hardware, software or a combined hardware-software module, may be a determining means, estimating means, capturing means, associating means, comparing means, identification means, selecting means, receiving means, sending means or the like as disclosed herein. As an example, the expression “means” may be a module corresponding to the modules listed above in conjunction with the Figures. 
     As used herein, the term “processing circuit” may refer to a processing unit, a processor, an Application Specific integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or the like. The processing circuit or the like may comprise one or more processor kernels. 
     As used herein, the expression “configured to” may mean that a processing circuit is configured to, or adapted to, by means of software configuration and/or hardware configuration, perform one or more of the actions described herein. 
     As used herein, the term “memory” may refer to a hard disk, a magnetic storage medium, a portable computer diskette or disc, flash memory, random access memory (RAM) or the like. Furthermore, the term “memory” may refer to an internal register memory of a processor or the like. 
     As used herein, the term “computer readable medium” may be a Universal Serial Bus (USB) memory, a DVD-disc, a Blu-ray disc, a software module that is received as a stream of data, a Flash memory, a hard drive, a memory card, such as a MemoryStick, a Multimedia Card (MMC), etc. 
     As used herein, the term “computer readable code units” may be text of a computer program, parts of or an entire binary file representing a computer program in a compiled format or anything there between. 
     As used herein, the term “radio resource” may refer to a certain coding of a signal and/or a time frame and/or a frequency range in which the signal is transmitted. In some examples, a resource may refer to one or more Physical Resource Blocks (PRB) which is used when transmitting the signal. In more detail, a PRB may be in the form of Orthogonal Frequency Division Multiplexing (OFDM) PHY resource blocks (PRB). The term “physical resource block” is known from 3GPP terminology relating to e.g. Long Term Evolution Systems. 
     As used herein, the terms “number” and/or “value” may be any kind of digit, such as binary, real, imaginary or rational number or the like. Moreover, “number” and/or “value” may be one or more characters, such as a letter or a string of letters. “Number” and/or “value” may also be represented by a bit string. 
     As used herein, the expression “in some embodiments” has been used to indicate that the features of the embodiment described may be combined with any other embodiment disclosed herein. 
     Even though embodiments of the various aspects have been described, many different alterations, modifications and the like thereof will become apparent for those skilled in the art. The described embodiments are therefore not intended to limit the scope of the present disclosure.