Abstract:
An animal communication device is provided which is designed to solicit animal responses based on at least two of the five major senses. The device includes a module having associated therewith a plurality of physically perceivable attributes related to the senses. The animal activates the device by depressing a housing cover which activates a switch. Alternatively, a motion detector is used to detect the presence of the animal. In both instances, a record/playback device is activated so that a pre-recorded message which corresponds to the physically perceivable attributes of the module is then played back.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS  
       [0001]    This application is a continuation-in-part of U.S. application Ser. No. 10/076,388, filed on Feb. 19, 2002. 
     
    
     
       BACKGROUND OF THE INVENTION  
         [0002]    1. Field of the Invention  
           [0003]    The present invention generally relates to an animal communication device, and in particular, to an animal communication device designed to solicit animal responses based on a stimulus of a plurality of the five major senses.  
           [0004]    2. Background of the Invention  
           [0005]    Researchers and animal lovers alike have long been interested in designing means of facilitating communication with animals. This has led to many attempts to create devices which allow for communication between animals and humans. Normally, these devices will appeal to one of an animal&#39;s senses in order to solicit a desired response. Once the animal has responded, the device then indicates the desired response has been received. This indication can take many forms such as playing a pre-recorded message, rewarding the animal, e.g., with a treat, or employing various other types of audio and/or visual indicators.  
           [0006]    Examples of prior art animal communication devices are those disclosed in U.S. Pat. Nos. 6,240,880; 5,604,478; 6,094,139 and 5,392,735. While each of these devices facilitate some form of communication between humans and animals, the device all suffer from various limitations and disadvantages. For example, each of these devices is limited in usefulness since, inter alia, most typically only appeal to one of an animal&#39;s senses. This limitation can render a communication device useless in cases where an animal loses a particular sense, such as sight, for which the particular device is designed and, more generally, limits the applicability and appeal of the device. In this regard, another limitation of most of those devices which only appeal to one sense is that, because of this limitation, the device cannot be used with more than one animal since different animals typically have varying abilities with respect to senses of sight, smell, taste, etc.  
         BRIEF SUMMARY OF THE INVENTION  
         [0007]    In accordance with the present invention, an animal communication device is provided which affords a number of advantages and although not limited to such an application, has particular appeal, for example, to both pets and pet owners.  
           [0008]    In accordance with one aspect of the invention, there is provided an animal communication device for enabling a land animal to communicate with a human, said device comprising:  
           [0009]    a primary module, comprising a housing and a housing cover mounted on said housing so as to be movable thereto in response to depression of the cover by the animal, said primary module having associated therewith a plurality of physically perceivable attributes selected from the group consisting of sight, smell, sound, taste, and touch;  
           [0010]    a speech unit disposed within said housing, said speech unit comprising a playback device for storing and playing back a recorded message and a speaker for broadcasting said recorded message, said recorded message comprising a message to be communicated by the animal to a human listener and said message being related to said plurality of said physically receivable attributes associated with the primary module; and  
           [0011]    a control switch, connected to said speech unit and disposed within said housing so as to be actuated by depression of said cover, for activating said playback device to cause playing back of said message in response to depression of said housing cover by the animal.  
           [0012]    Preferably, the animal communication device further comprises a panel, the panel is disposed on an upper surface of said housing cover, and the panel has associated therewith at least one of said plurality of physically perceivable attributes.  
           [0013]    Advantageously, the panel is shaped and designed so as to present a sight stimulus. In one preferred implementation, the panel incorporates a scented element providing a smell stimulus. Alternatively, or in addition, the panel includes at least one textured portion providing a touch stimulus.  
           [0014]    Preferably, two or more of the sight stimulus, smell stimulus and touch stimulus relate to a common animal-related request reflected in said message. In one important embodiment, the common request is the need to eat and a corresponding recorded message is played back responsive to actuation of said switch. In another important embodiment, the common request is the need to go out and a corresponding message is played back responsive to actuation of said switch.  
           [0015]    Advantageously, the animal communication device further comprises spring means for resiliently supporting said cover in spaced relation to an upper portion in said housing so as to enable depression of said cover relative to the housing. Preferably, the cover includes a recessed bottom surface and said spring means includes at least one coil spring adapted to engage said recessed bottom surface.  
           [0016]    Preferably, the animal communication device further comprises means for enabling recording of a recorded message by said playback device in a record mode for playback by said playback device in a play mode. Advantageously, the animal communication device further comprises a further switch for controlling switching between said record mode and said playback mode.  
           [0017]    In an advantageous implementation, the animal communication device further comprises a second module connected to the primary module, said second module having associated therewith a plurality of physically perceivable attributes selected from the group consisting of sight, smell, sound, taste, and touch, said physically perceivable attributes of said first and second modules relating to different animal-related themes.  
           [0018]    In accordance with a further aspect of the invention, there is provided the animal communication device for enabling an animal to communicate with a human, the device comprising:  
           [0019]    a primary module, comprising a housing and a housing cover mounted on said housing so as to be movable thereto in response to depression of the cover by the animal, said primary module having associated therewith at least one physically perceivable attribute related to the need of the animal to eat and selected from the group consisting of sight, smell, sound, taste, and touch;  
           [0020]    a speech unit disposed within said housing, said speech unit comprising a playback device for storing and playing back a recorded message reflecting the need of the animal to eat and a speaker for broadcasting said recorded message; and  
           [0021]    a control switch, connected to said speech unit and disposed within said housing so as to be actuated by depression of said cover by the animal, for activating said playback device to play said recorded message in response to depression of said housing cover by the animal.  
           [0022]    In accordance with a still further aspect of the invention, there is provided an animal communication device for enabling an animal to communicate with a human comprising:  
           [0023]    a primary module, comprising a housing and a housing cover mounted on said housing so as to be movable thereto in response to depression of the cover by the animal, said primary module having associated therewith at least one physically perceivable attribute related to the need of the animal to go out and selected from the group consisting of sight, smell, sound, taste, and touch;  
           [0024]    a speech unit disposed within said housing, said speech unit comprising a playback device for storing and playing back a recorded message reflecting the need of the animal to go out and a speaker for broadcasting said recorded message; and  
           [0025]    a control switch, connected to said speech unit and disposed within said housing so as to be actuated by depression of said cover by the animal, for activating said playback device to play said recorded message in response to depression of said housing cover by the animal.  
           [0026]    According to another aspect of the invention, there is provided an animal communication device comprising:  
           [0027]    a primary module, comprising a housing and a housing cover mounted on said housing so as to be movable thereto in response to depression of the cover, said primary module having associated therewith a plurality of physically perceivable attributes selected from the group consisting of sight, smell, sound, taste, and touch;  
           [0028]    a speech unit disposed within said housing, said speech unit comprising a playback device for storing and playing back a recorded message and a speaker for broadcasting said recorded message; and  
           [0029]    a control switch, connected to said speech unit and disposed within said housing so as to be actuated by depression of said cover, for activating said playback device in response to depression of said housing cover, said device further comprising a second module connected to the primary module,  
           [0030]    said second module having associated therewith a plurality of physically perceivable attributes selected from the group consisting of sight, smell, sound, taste, and touch, and said physically perceivable attributes of said first and second modules relating to different animal-related themes.  
           [0031]    According to a further aspect of the invention, there is provided an animal communication device for enabling a land animal to communicate with a human, said device comprising:  
           [0032]    a primary module comprising a housing and having associated therewith a plurality of physically perceivable attributes selected from the group consisting of sight, smell, sound, taste, and touch;  
           [0033]    a speech unit disposed within said housing, said speech unit comprising a playback device for storing and playing back a recorded message and a speaker for broadcasting said recorded message, said recorded message comprising a message to be communicated by the animal to a human listener and said message being related to said plurality of said physically receivable attributes associated with the primary module; and  
           [0034]    a motion detector, connected to said speech unit and disposed within said housing, for activating said playback device to cause playing back of said message in response to detection of the animal.  
           [0035]    Preferably, the animal communication device of this embodiment further comprises a panel, the panel is disposed on an upper surface of said housing, and the panel has associated therewith at least one of said plurality of physically perceivable attributes.  
           [0036]    In one embodiment, the panel is shaped and designed so as to present a sight stimulus. In another embodiment, the panel incorporates a scented element providing a smell stimulus. Alternatively, in addition, the panel includes at least one textured portion providing a touch stimulus.  
           [0037]    Preferably, two or more of the sight stimulus, the smell stimulus and the touch stimulus relate to a common animal-related request reflected in said message. In one important embodiment, the common request is the need to eat and a corresponding recorded message is played back responsive to detection of the animal. In another important embodiment, the common request is the need to go out and a corresponding message is played back responsive to detection of the animal.  
           [0038]    Preferably, the animal communication further comprises means for enabling recording of a recorded message by said playback device in a record mode for playback by said playback device in a play mode. Advantageously, the animal device further comprises a switch for controlling switching between said record mode and said playback mode.  
           [0039]    In an advantageous implementation, the animal communication device further comprises a second module connected to the primary module, said second module having associated therewith a plurality of physically perceivable attributes selected from the group consisting of sight, smell, sound, taste, and touch, said physically perceivable attributes of said first and second modules relating to different animal-related themes.  
           [0040]    According to yet another aspect of the invention, there is provided an animal communication device for enabling an animal to communicate with a human, said device comprising:  
           [0041]    a primary module, comprising a housing and having associated therewith at least one physically perceivable attribute related to the need of the animal to eat and selected from the group consisting of sight, smell, sound, taste, and touch;  
           [0042]    a speech unit disposed within said housing, said speech unit comprising a playback device for storing and playing back a recorded message reflecting the need of the animal to eat and a speaker for broadcasting said recorded message; and  
           [0043]    a motion detector, connected to said speech unit and disposed within said housing, for activating said playback device to play said recorded message in response to detection of the animal.  
           [0044]    In accordance with a still further aspect of the invention, there is provided an animal communication device for enabling an animal to communicate with a human comprising:  
           [0045]    a primary module, comprising a housing and having associated therewith at least one physically perceivable attribute related to the need of the animal to go out and selected from the group consisting of sight, smell, sound, taste, and touch;  
           [0046]    a speech unit disposed within said housing, said speech unit comprising a playback device for storing and playing back a recorded message reflecting the need of the animal to go out and a speaker for broadcasting said recorded message; and  
           [0047]    a motion detector, connected to said speech unit and disposed within said housing, for activating said playback device to play said recorded message in response to detection of the animal.  
           [0048]    According to another aspect of the invention, there is provided an animal communication device comprising:  
           [0049]    a primary module, comprising a housing and having associated therewith a plurality of physically perceivable attributes selected from the group consisting of sight, smell, sound, taste, and touch;  
           [0050]    a speech unit disposed within said housing, said speech unit comprising a playback device for storing and playing back a recorded message and a speaker for broadcasting said recorded message; and  
           [0051]    a motion detector, connected to said speech unit and disposed within said housing, for activating said playback device in response to detection of the animal,  
           [0052]    said device further comprising a second module connected to the primary module,  
           [0053]    said second module having associated therewith a plurality of physically perceivable attributes selected from the group consisting of sight, smell, sound, taste, and touch, and said physically perceivable attributes of said first and second modules relating to different animal-related themes.  
           [0054]    Further features and advantages of the present invention will be set forth in, or apparent from, the detailed description of preferred embodiments thereof which follows. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0055]    [0055]FIG. 1 is a top plan view of a first preferred embodiment of the animal communication device of the invention;  
         [0056]    [0056]FIG. 2 is a top plan view of an alternative preferred embodiment of the device of FIG. 1;  
         [0057]    [0057]FIG. 3 is a side elevational view of a preferred embodiment of the animal communication device of the present invention;  
         [0058]    [0058]FIGS. 4 and 5 are end elevational views of the device of FIG. 3;  
         [0059]    [0059]FIG. 6 is a top plan view of the device of FIG. 3, with the cover removed;  
         [0060]    [0060]FIG. 7 is a side elevational view, from the opposite side of the device, of the device of FIG. 3;  
         [0061]    [0061]FIG. 8 is a bottom plan view of the panel of FIG. 2 showing a scented element disposed therein;  
         [0062]    [0062]FIG. 9 is a side elevational view of an animal communication device in accordance with a further embodiment of the invention;  
         [0063]    [0063]FIG. 10 is a top plan view of yet another embodiment of the invention;  
         [0064]    [0064]FIG. 11 is a top plan view showing two devices, corresponding to those shown in FIGS. 1 and 2, connected to one another;  
         [0065]    [0065]FIG. 12 is a schematic circuit diagram of a speech unit and associated circuitry in accordance with one preferred embodiment of the present invention;  
         [0066]    [0066]FIG. 13 is a schematic circuit diagram of the electrical circuitry of an auxiliary or peripheral communication device, including the electrical connection between two modules; and  
         [0067]    [0067]FIG. 14 is a schematic circuit diagram of a further embodiment of the invention employing a motion detector for activating the speech unit.  
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0068]    Referring to FIGS.  1  to  7 , wherein like numerals represent the same elements throughout the several views, there is shown a first preferred embodiment of the animal communication device of the invention. The device, which is generally denoted  10 , includes a housing module or housing  12  including a cover  14 , side walls  16  and end walls  18 . In the embodiment illustrated, housing  12  is of a rectangular shape but may also be of other shapes including rounded or curved configurations. The housing  12  is preferably constructed of a hard plastic or the like but may be constructed of any material which is rugged or sturdy enough to withstand the weight of an animal depressing cover  14 , in the manner described below.  
         [0069]    As is best seen in FIGS.  3  to  6 , the side and end walls  16 ,  18  of housing  12  include upper portions of reduced thickness, denoted  16   a  and  18   a , which are received in an opening  14   a  of cover  14  (see FIG. 3). Upstanding coil springs  20  are mounted at the four corners of wall portions  16   a ,  18   a , as is best seen in FIG. 6. Thus, cover  14  rests on springs  20  and is normally supported thereby in spaced relation to housing  12 , as indicated in dashed lines in FIG. 7.  
         [0070]    Housing  12  serves to house a speech unit circuit board  22  which supports a speech unit  24  (see FIG. 12) and associated circuitry described below. Also mounted on circuit board  22  is a microswitch  26  including a leaf spring switch element or switch arm  26   a  that is adapted to be engaged by cover  12  to activate microswitch  26  when cover  14  is depressed. In other words, depressing cover  14  against the force of coil springs  20  causes the inside bottom surface of recess  14   a  of cover  14  to engage switch element  26   a  and activate switch  26  and thus trigger speech unit  24 , described in more detail below.  
         [0071]    As indicated in FIG. 6, housing  12  also contains a speaker  28  which is supported in one of the end walls  18  and which is electrically connected to speech unit  24  so as to broadcast the output therefrom. As shown in FIG. 4, the corresponding end wall  18  and wall portion  18   a  include an array or pattern of sound transmitting openings  30  therein aligned with the speaker face. The cover  14  includes a similar pattern of aligned openings (not shown).  
         [0072]    As shown in FIG. 3, a power switch  32 , which controls switching of the device  10  on and off, and a DC input jack  34  are located in one side wall  16  of housing  12 . Similarly, as shown in FIG. 7, the opposite side wall  16  includes a play-record control switch  36  and a microphone jack  38 . Again, these are part of the speech unit system described below in connection with FIG. 12.  
         [0073]    As shown in FIG. 5, a series of connection holes  38  are provided in the end wall  18  of housing  12  opposite that at which speaker  28  is located. The purpose of these holes  38  is described in more detail below in relation to FIGS. 11, 12 and  13 .  
         [0074]    Referring again to FIG. 1, the cover  14  of housing  12  includes a raised portion or panel  40  on the upper surface thereof. In the embodiment of FIG. 1, panel  40  is shaped and inscribed or otherwise designed so as to represent a bowl of pet (dog) food. In general, panel  40  is preferably in the form of a three dimensional cutout visually depicting, in pictorial form, an item of appeal to the pet in question, or one that associated with a particular activity or need of the pet. Thus, in the embodiment of FIG. 1, the bowl of food is used to effect the audio response, in the form of a message recorded by speech unit  24 , and broadcast when cover  14  is depressed to activate microswitch  26 , that “I am hungry.” In the embodiment illustrated in FIG. 2, in which panel  42  depicts a tree, the corresponding message is “I want to go out.” In this instance, and some other instances, the pictorial representation itself may not be that meaningful to the pet (i.e., the depiction of a tree or a fire hydrant would mean much more to the dog owner than to the pet dog) and the association may have to be learned by the pet. Moreover, as discussed below, at least one further prompting stimulus is provided.  
         [0075]    In addition to the particular shape, a particular color can also be provided which the pet or other animal can associate with the specific message. Further, the panel  40  or  42  preferably includes at least a part thereof of a particular texture that the animal associates with the message. For example, for panel  40 , the texture may be that of dog food, of a bowl as indicated at  40   b , or of both.  
         [0076]    In addition, the panel  40  or  42  preferably includes a compartment therein, indicated at  44  in FIG. 8 for panel  42 , for containing a scented element  46  for producing a distinct smell that the animal normally associates with, or can learn to associate with, the recorded message in question. The scented element  46  can comprise a scented wax, a scented oil or other chemical extract on a cloth, or another suitable porous and/or absorbent carrier, a scent absorbent backing strip or the like.  
         [0077]    Finally, the sense of taste can also be employed by, e.g., affixing, to the device  10 , a taste element (not shown in FIGS. 1 and 2) providing a unique taste. The taste element can be provided on the surface of panel  40  or  42  or elsewhere on housing  12 . In the latter regard it will be noted that although the sense stimulating element is preferably disposed on the panel to be depressed, as in each of the instances described above, this is not necessary and such an arrangement may not always be convenient. Thus, as shown in FIG. 9, in a different configuration, a visual cutout or panel  46 , corresponding to panel  42  of FIGS. 2 and 8, can be located on the side of the housing  12  and a scented element  48 , including scent release holes  48   a , may be provided on housing  12  adjacent to panel  46 . Further, sense stimulating elements are located on cover  14  adjacent to the panel  40  (or  42 ) rather than being part thereof. Thus, as shown in FIG. 9, the taste element, which is denoted  50  in FIG. 10, can be located on the upper surface of cover  14  adjacent to the cutout panel  40  (or  42 ). The taste element  50  can comprise a taste member  52  in the form of a slide or the like which is treated with an artificial, chemically simulated, taste-invoking composition or agent and which is removably received in a slide holder  54 . It will be appreciated that there can be problems with simulating taste. For example, a dog owner would, of course, like to avoid a situation where the pet dog attempts to chew the taste element  50  off of the device  10 , and thus, the taste simulated is preferably reasonably subtle and a relatively rugged protective housing or mounting, such as slide holder  54 , is preferably provided. Further, by making the taste element  50  replaceable, the problem of the taste element losing its taste over time can be combated.  
         [0078]    A stimulus based on the sense of sound can also be provided. A battery-powered sound source similar to a conventional noise maker can be used for this purpose. The relationship between the sound emitted and the act to be stimulated (e.g., I am hungry) may have to be learned. This is particularly true where the sound is to be continuously broadcast in that an otherwise suitable sound (e.g., “treat”) may become irritating to the pet owner when repeated over and over.  
         [0079]    It will be appreciated that all of the sense stimulants provided should work together. Thus, in the first preferred implementation of the embodiment shown in FIG. 1, depicting the bowl of e.g., dog food, the smell or scent would be that of dog food or other food, the feel or texture would be that of the food or of a dog dish or bowl, or both, and the taste would be suggestive of the taste of the food. Similarly, in a preferred implementation of the embodiment of FIG. 2, depicting a tree, the scent could be the odor of pine, cedar or other wood, and the texture or texturized surface provided could have the feel of bark. A related taste could also be provided although taste would obviously be less suggestive and hence less important here.  
         [0080]    Where it is desired for a pet or other animal to generate more than one message (e.g., to generate a message in addition to “I am hungry,” e.g., the additional message that “I want to go out”), two or more units or devices can be connected together as shown in FIG. 11. Electrical connectors  56  provide a connection between the circuits of the two units which are denoted  10  and  10 ′ in FIG. 11. Of course, three or more units with different messages can be connected together if desired. The electrical circuits for the two individual units  10  and  10 ′ are described below.  
         [0081]    Referring to FIG. 12, there is shown a schematic circuit diagram for the electrical circuit of the basic device or unit  10 . The electrical circuit includes a battery power source (batteries)  58  which is housed within housing  12 , preferably behind a sliding door or the like (not shown). Jack  34 , which was described above, is used to enable the unit  10  to be plugged into a conventional A.C. wall outlet through a suitable A.C. adapter (not shown). When unit  10  is plugged into the wall, batteries  58  are unnecessary and are temporarily disconnected by an auxiliary switch  60 .  
         [0082]    A control switch  62  is connected between a series of outputs from speech unit  24  and the electrical connections from speech unit  24  and the connectors  56  for, in the illustrated embodiment, five other peripheral or auxiliary units. Control switch  62 , when activated, provides a connection to the first auxiliary unit (identified as unit  2  where the main unit is unit  2 ). Speaker  28 , power switch  32 , jack  34 , play-record switch  36 , and microphone jack  38  are all connected as shown to speech unit  24 . It will be appreciated that the unit  10  can include a built-in microphone instead of the jack  38  for an external microphone.  
         [0083]    In exemplary embodiment, the speech unit or module  24  comprises an Electronic Record/Playback Module, K4400, Velleman kit. Speech unit  24  is located in the basic or main module or unit  10 , and thus all of the peripheral or auxiliary units (corresponding, e.g., to unit  10 ′ of FIG. 11) will share speech module  24 . In the illustrated embodiment, the speech unit  24  is used with a standard tape recorder microphone (not shown) plugged into jack  38 , although, as indicated above, an internal microphone can also be used. In use, the microphone is used in conjunction with the speech unit  24  to record a suitable message which logically corresponds to the physically perceivable attributes associated with the particular unit or device  10 . For example, as described above, for the embodiment of FIG. 1 wherein raised panel  40  is shaped and designed to simulate a dog bowl with dog food and, e.g., the scent of dog food is also simulated, the message that would be recorded would be “I am hungry” or something similar. Of course, a prerecorded message can be used but it adds to the appeal of the device to provide a capability such that, e.g., the actual voice of the dog&#39;s master is recorded, in the example under consideration here. Of course, further, different voices can be used for the message as the pet owner desires. In another example, as discussed hereinbefore, for the embodiment of FIG. 2, the message would be “I need to go out” or something similar.  
         [0084]    As was also indicated above, the main unit or module is plugged into the peripheral units or module by virtue of electrical connectors  56 . It is noted that if more than the two units  10  and  10 ′ shown in FIG. 11 are to be connected together, the units would be connected together in serial relationship. Referring to FIG. 13, the circuit diagram for peripheral unit  10 ′ of FIG. 11 is shown. Because, as discussed above, the speech module  24  and associated circuitry are contained within main unit  10 , the electrical circuitry for unit  10  is highly simplified and basically comprises a microswitch  26 ′ (which is activated by depressing of the cover for unit  10 ′ as described above for switch  26 ) and a control switch  62 ′ which, when activated, completes the electrical connection to a third unit (unit  3 ) if a third unit is to be used.  
         [0085]    Referring to FIG. 14, this is shown a schematic diagram of the components and electrical circuitry for a further preferred embodiment of the invention. In this embodiment, the illustrated components would be housed in a module corresponding to that described in connection with the various embodiments previously discussed but actuation or activation of the unit is effected by means of a motion detector  64  rather than by depressing on the cover of the module as in the other embodiments. Accordingly, the cover of the module of the embodiment can be a simple cover without any support springs and without an associated microswitch, or, in another implementation, the module can simply be sealed. The use of motion detector  64  eliminates the need for the pet to depress the cover of module to provide actuation, a task that may not come naturally to and/or may be difficult to teach to, some pets. Thus, the motion detector  64  is set so that output beam produced thereby is interrupted by the pet nearing the module, i.e., when the pet, in approaching the module, breaks the beam. Motion detector  64  is conventional per se and in an exemplary embodiment comprises a miniature passive infrared (IR) motion detector such as the SPY-4 detector made by Visonic Ltd.  
         [0086]    The overall circuitry of FIG. 14 is generally similar to that of FIG. 12, In brief, the normally closed contacts of motion detector  64  are connected through a transistor  66 , and a “test” switch  68  connected in the emitter circuit of transistor  66 , to the “play” input of an audio board or speech unit  70 . A shunt capacitor  72  and a resistor  74  are connected as shown.  
         [0087]    A “record” switch  76  is connected to the “record” inputs of audio board  70 . As illustrated, power supply connections similar to those described above, and including a power switch  78 , and an auxiliary switch  80  shunted by a diode  82 , are connected to the power inputs of both motion detector  64  and audio board  70 .  
         [0088]    The output of audio board  70  is connected to a microphone  84  and to amplifier  86 . The output of the latter is connected to a speaker  88 .  
         [0089]    As indicated above, the overall operation of this embodiment is similar to that of the previous embodiments, except that motion detector  64  is used to detect the presence of the pet and there is no requirement for (nor provision for) the pet to depress a switch to cause actuation of the speaker unit or audio board  70 .  
         [0090]    Although the invention has been described above in relation to preferred embodiments thereof, it will be understood by those skilled in the art that variations and modifications can be effected in these preferred embodiments without departing from the scope and spirit of the invention.