Abstract:
An interior rearview mirror audio system for a vehicle includes an interior rearview mirror assembly preferably comprising a plurality of microphones, a communication system of a vehicle and at least one manually actuated control input. The communication system includes a cellular telephone system and/or an emergency communication system. The communication system includes at least one communication device. The manually actuated control receives a manual input from an occupant of the vehicle and activates and/or adjusts the communication device of the communication system in response to the manual input. A control is preferably provided for receiving output signals of at least two microphones, the output signals comprising both vocal signals and non-vocal signals, and the control at least partially filtering out the non-vocal signals.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This is a continuation of U.S. patent application Ser. No. 09/853,974, filed May 11, 2001 by Jonathan E. DeLine et al. entitled MIRROR-BASED AUDIO SYSTEM FOR VEHICLE (Attorney Docket DON01 P-897), now U.S. Pat. No. 6,433,676 which is a continuation of U.S. patent application Ser. No. 09/382,720, filed Aug. 25, 1999, by Jonathan E. DeLine et al., entitled ACCESSORY MODULE FOR VEHICLE, now U.S. Pat. No. 6,243,003 (Attorney Docket DON01 P-768), which are hereby incorporated herein by reference in their entireties. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention relates generally to an accessory module for vehicles and, more particularly, to an accessory module for mounting a microphone for use in receiving an audio signal within a vehicle. 
     Many vehicles today use hands-free cellular telephones or other communication devices to avoid problems which may arise when a driver of a vehicle has to hold a telephone while driving the vehicle. These hand-free devices include a microphone to receive an audio signal from within the vehicle. It is known to include directional or polar microphones in these devices, which constrain the area covered by the microphone to an area where voices would typically originate, such as a driver&#39;s head area. In certain applications, these microphones are implemented in an interior rearview mirror, such that the microphone is positioned in front of the driver and at approximately the same level as the head of the driver. However, the location of the mirror may be at a distance which is beyond the optimal operative range of the microphone, due to the forward slant of the windshield away from the driver and the location at which the mirror is mounted thereto. Furthermore, rearview mirrors are adjustable to account for different sized drivers, which may result in the microphone being directed away from the head of the driver or other occupants, and thus receiving other noises from within the cabin of the vehicle. 
     An additional issue with known mirror-mounted microphones (such as interior rearview mirror assemblies with a microphone located within the movable mirror housing and/or the mirror mounting bracket, such as a header mounting bracket) is that typically, audio or communication devices in vehicles are optional. Accordingly, separate mirror housings and wiring bundles or harnesses are required to accommodate the standard mirror and the optional mirror which includes the microphone or other accessories such as a vehicle alarm status indicator. This leads to a proliferation of parts within the vehicle assembly plants, which further results in increased costs to the vehicle. 
     Many vehicles which offer hands-free communication devices mount the microphones in a headliner console rearward of the windshield and along the ceiling of the interior cabin of the vehicle. By mounting the microphones in the headliner console, the microphones may be in a substantially fixed position and directed toward the driver head area within the vehicle. However, this positions the microphone substantially above the driver where it may not optimally pick up the voice signal of the driver, since the driver&#39;s voice is directed generally forwardly while the driver continues to view the roadway, while the microphone is directed generally downwardly from the ceiling. Furthermore, locating the microphones in a headliner console adds to the vehicle costs, due to additional installation processes and more costly parts, such as additional ceiling trim, console components and the like. Also, locating the microphone in a headliner console fails to avoid the requirement of at least two separate headliner consoles to accommodate the optional microphone verses a console without the microphone. 
     Therefore, there is a need in the art for a microphone which may be mounted generally forwardly of the driver of the vehicle, and fixedly mounted to maintain proper orientation with respect to the driver of the vehicle. 
     SUMMARY OF THE INVENTION 
     The present invention is intended to provide an accessory module which preferably mounts along an upper, inner edge of the windshield of a vehicle to direct a microphone, and preferably a polar or directional microphone, generally downwardly and rearwardly toward the driver of the vehicle. The accessory module is adaptable for use on a vehicle with a rearview mirror which is separately mounted on the interior surface of the windshield such as a button mounted rearview mirror, and may further include a wire cover extending downwardly from the module to the mounting button of the rearview mirror. The wire cover functions to cover any mirror wiring harness which may connect the rearview mirror assembly to a vehicle wiring harness, typically within the headliner of the vehicle. 
     According to an aspect of the present invention, an accessory module comprises at least one microphone for receiving audio signals from within a cabin of a vehicle and a housing for mounting the microphone. The vehicle includes a windshield, an interior rearview mirror mounted to an interior surface of the windshield, and a headliner extending along an upper edge of the windshield. The housing for the microphone is preferably mountable between the headliner and the rearview mirror. The microphone of the accessory module (and any other accessory housed within the accessory module) is electronically connectable to a vehicle wiring within the headliner. Preferably, accessories, such as the microphone, are detachable connectable to the vehicle wiring, such as by a plug and socket connector (for example, a multi-pin electrical plug and socket connector system), so that the module can be optionally installed to the vehicle with ease. This is particularly advantageous in circumstances when the interior mirror is a non-electrical mirror, such as a base prismatic mirror. 
     In one form, the rearview mirror is electronically connected to the vehicle wiring harness. Preferably, the microphone module further includes a wire cover to encase a wire harness between the rearview mirror and the microphone module. More preferably, both the microphone and mirror are connectable with the vehicle wiring in the headliner. 
     According to another aspect of the present invention, an accessory module for a vehicle comprises at least one microphone for receiving audio signals from within a cabin of the vehicle, a microphone housing for mounting the microphone, and an interior rearview mirror assembly. The vehicle includes a windshield and a headliner extending along an upper, inner edge of the windshield. The microphone is electronically connectable to a vehicle wiring harness within the headliner. The microphone housing is mountable to the windshield adjacent to the headliner. The mirror assembly includes a mirror wire harness and a mirror housing. The mirror wire harness is electronically connectable to the vehicle wiring harness in the headliner. 
     In one form, the mirror assembly further includes a mounting button for mounting the mirror assembly to an interior surface of the windshield. The mounting button may be interconnected to the microphone housing via a wire cover extending between the microphone housing and the mounting button and at least partially encasing the mirror wire harness and/or the mounting button itself. 
     In another form, the microphone housing includes a mirror mounting arm which extends generally downwardly therefrom. The mirror housing is pivotally interconnected to a lower end of the mounting arm. The mirror wire harness is at least partially encased within the mounting arm. 
     Accordingly, the present invention provides a microphone module for installation of a microphone for use with an audio system, such as a hands-free cellular telephone, audio recording device, emergency communication device or the like. The accessory module containing the microphone is preferably mounted above the mirror between the mirror and the headliner of the vehicle, which provides a fixed location of the microphone for maintaining proper orientation of the microphone with respect to the vehicle interior. Because the microphone module is a separate component from the mirror and headliner, additional mirror or headliner console components for mounting the microphone are not required. The present invention facilitates fewer parts in the assembly plant since the headliner and mirror assembly may be the same part regardless of whether the audio or communication device associated with the invention is to be installed within the vehicle. Furthermore, because the microphone module does not require special headliners or mirrors, the microphone module may be easily installed as an aftermarket device. 
     These and other objects, advantages, purposes and features of this invention will become apparent upon review of the following specification in conjunction with the drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of the microphone module of the present invention; 
     FIG. 2 is a side elevation shown partially in section of the microphone module in FIG. 1; 
     FIG. 3 is a similar side elevation as that in FIG. 2, showing an alternate electrical connection and mounting bracket for the microphone module; 
     FIG. 4 is a sectional plan view of the microphone module taken along the line IV—IV in FIG. 3; 
     FIG. 5 is a similar side elevation as that in FIG. 2, showing a microphone module without a wire cover but including a self-coiling wire harness; 
     FIG. 6 is an elevation looking forwardly in a vehicle cabin of a microphone module and mirror housing having controls mounted thereon; 
     FIG. 7 is a side elevation shown partially in section of a microphone module and mirror housing having various electrical and/or electronic components therein; and 
     FIG. 8 is a similar side elevation as that in FIG. 2 of an alternate embodiment of the present invention, having a rearview mirror mounted to an arm extending downwardly from the microphone module. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring now specifically to the drawings, and the illustrative embodiments depicted therein, a microphone module  10  is mounted adjacent to a vehicle windshield  12 , as shown in FIG.  1 . Microphone module  10  may be implemented in the vehicle in association with a cellular telephone, a recording device, such as a dictation system, an emergency communication device, such as the ONSTAR system commercially available in certain General Motors vehicles, or any other audio device which may include a microphone or audio receiving device. Preferably, the manually actuated buttons to operate the ONSTAR system are mounted at a movable housing  16   b  of an interior rear view mirror assembly  16 , such as is shown generally at  13  in FIG.  1 . The vehicle includes a headliner  14 , which at least partially covers the ceiling of an interior passenger compartment of the vehicle and has a forward edge  14   a  which interfaces with an upper edge  12   a  of windshield  12 . An interior rearview mirror assembly  16  may be mounted to an interior surface  12   b  of windshield  12 , typically at a position spaced downwardly from upper edge  12   a  and the position of module  10 . Microphone module  10  includes at least one microphone  18  which is fixedly secured within a microphone housing  20  and is directed toward an area generally defined by the location of a head of a typical driver of the vehicle. Microphone module  10  may further include a wire cover  22  which extends downwardly between housing  20  and mirror assembly  16  to encase or cover a mirror wire harness  24 , which may be included in mirror assembly  16  to provide power or control signals to components or accessories which may be mounted within or associated with mirror assembly  16 . 
     As shown in FIG. 2, mirror assembly  16  may include a conventional mounting button  16   a  and a mirror housing  16   b  supporting a prismatic, electro-optic or electrochromic reflective element. Mounting button  16   a  is adhesively secured to interior surface  12   b  of windshield  12  at a location substantially below forward edge  14   a  of headliner  14  and upper edge  12   a  of windshield  12 , as is known in the art. Mirror housing  16   b  is pivotally mounted to mounting button  16   a  via an arm  16   c , which is pivotally interconnected to button  16   a  or housing  16   b , or both. Mirror housing  16   b  encases a reflector  16   d  (FIG. 7) for reflecting an image of a scene generally rearwardly of the vehicle to the driver (and with the mirror housing being adjustable by the driver), and a bezel  16   e which retains reflector  16   d  in housing  16   b , as is well known in the art. Mirror wire harness  24  extends generally upwardly from mirror housing  16   b  to headliner  14  for electrical connection with a vehicle wiring harness  28  (FIG.  3 ). Mirror wire harness  24  provides electrical power and/or control signals to the mirror assembly  16  or various mirror mounted accessories within assembly  16 , such as power for electro-optic/electrochromic mirrors, interior lights (such as map lights in the mirror housing), and displays such as for compass headings, temperatures, passenger airbag status, or the like. 
     Headliner  14  extends along upper edge  12   a  of windshield  12  and may be a plastic trim panel to secure a fabric ceiling cover and provide an aesthetically pleasing finish between the windshield and the fabric ceiling cover of the vehicle. Alternately, headliner  14  may be a forward portion of the fabric cover or a ceiling console. Headliner  14  may further include other trim or headliner console components (not shown), for storing various articles, such as sunglasses, garage door openers or the like or for housing other components or accessories associated with the vehicle. 
     Preferably, microphone module  10  includes wire cover  22  (FIGS.  1  and  2 ), which extends between a lower edge  20   c  of housing  20  and mounting button  16   a  of mirror  16 . Mirror harness  24  is encased within wire cover  22  to retain harness  24  and provide a finished appearance to the electrical connection of mirror  16  to vehicle wiring harness  28 . Preferably, wire cover  22  is telescopingly extendable and retractable to adapt the length to different mounting locations of mounting button  16   a  relative to headliner  14  on various vehicles. As best shown in FIG. 2, wire cover  22  may extend or retract by sliding upwardly or downwardly within housing  20 . This facilitates implementation of microphone module  10  in various vehicles and further facilitates the aftermarket installation of module  10  in vehicles having a button-mounted interior rearview mirror. 
     Microphone module  10  is preferably secured to interior surface  12   b  of windshield  12  at an interface junction  26  between forward edge  14   a  of headliner  14  and interior surface  12   a  of windshield  12 . However, it is envisioned that microphone module  10  may be mounted in other locations. Housing  20  of microphone module  10  is preferably formed with a substantially flat windshield mounting surface  20   a  and a curved, concave headliner surface  20   b , such that housing  20  mounts to windshield  12  along mounting surface  20   a , while headliner surface  20   b  substantially uniformly engages headliner  14  to provide a flush, finished transition between microphone module  10  and headliner  14 . Preferably, housing  20  is adhesively secured to interior surface  12   b  of windshield  12 , such as by bonding, pressuring sensitive adhesives, anaerobic adhesives, double faced tape, or the like. However, microphone module  10  may optionally be mechanically secured to an intermediate mounting bracket adhered to the windshield, or may be connected to the headliner itself, as discussed below, without affecting the scope of the present invention. Microphone module  10  is preferably a plastic molded part, which facilitates forming the part in various shapes to match the headliner/windshield interface and to further facilitate providing the part in different colors to match optional interior colors of the vehicles. 
     Mirror harness  24  may connect directly to vehicle wiring  28  while an accessory wiring harness  30  may separately connect to the vehicle wiring to provide power and/or control signals to the accessories within accessory module  10 . Alternately, mirror harness  24  may connect to module  10 , which may then be connectable to vehicle wiring  28 , as shown in FIGS. 3 and 7. Because microphone module  10  may be a separate module from the headliner and the mirror assembly, and because module  10  is preferably connected to the vehicle wiring independent of wires from the interior rear view mirror assembly to the vehicle wiring, microphone module  10  may be easily removed or accessed for serviceability or replacement without having to remove or replace the mirror assembly. This is a significant advantage over the prior art because if the microphone is damaged, the more expensive components, such as the mirror or headliner console, do not have to be replaced in order to repair or replace the microphone. 
     Microphone module  10  is mounted to windshield  12  such that microphone  18  is directed downwardly and rearwardly toward the driver&#39;s seat of the vehicle to optimally receive audio signals therefrom. Preferably, microphone  18  is a directional or polar microphone, which limits the audio signal received to signals within the area toward which the microphone is directed. Such microphones are known in the art and are commercially available as an AKG 400 Series or a 501T Series microphone from A.K.G. Acoustics/GMBH in Vienna, Austria. These microphones are operable to receive audio signals from within the targeted area, while substantially reducing or limiting the signals received from outside that area. By mounting microphone  18  within housing  20  and directing microphone  18  downward and rearward toward a typical location of a driver&#39;s head, the audio signal detected by microphone  18  will be dominated by a voice signal from the driver of the vehicle and will substantially limit noise signals originating from other sources, such as the engine, road, wind, HVAC, radio, turn signals and the like. Because microphone  18  is fixedly mounted within housing  20 , microphone  18  may be optimally directed toward the area of interest, and will not be adjusted or misdirected when the mirror is adjusted for a different driver of the vehicle. 
     Alternately, multiple microphones may be implemented within microphone module  10  to receive various signals from different directions. As is known in the audio art, RMF techniques may be implemented to digitize individual outputs from the multiple microphones and integrate the outputs to establish which outputs are the loudest and which have the presence of human audible signals verses noise. The signals which have the greatest presence of human audible signals may then be selected over the signals of the other microphones, thereby providing a voice signal to the communication device. 
     Microphone module  10  further includes a microphone wire harness  30  (FIG.  3 ), which extends from microphone  18  through headliner surface  20   b  of housing  20  and into headliner  14 . Microphone  18  is preferably interconnectable to the vehicle harness by microphone harness  30  in a conventional manner. Preferably, microphone harness  30  comprises a pair of wires for microphone  18 . Clearly, however, if multiple microphones are implemented in microphone module  10 , multiple wires (not shown) will correspondingly be required. 
     As shown in FIG. 2, the audio system may further include a loud speaker  42  for providing an audible signal to the driver and passengers of the vehicle. Speaker  42  may be mounted to housing  20  and includes a wiring harness  43  for electrical connection to the vehicle wiring  28 , similar to microphone  18 . Speaker  42  may be a conventional diaphragm speaker, piezo-electric speaker, such as a piezo-electric ceramic speaker, or the like. Most preferably, speaker  42  is a piezo-electric ceramic moldable speaker. Additional speakers may be mounted within the accessory module  10  or in a pod  17  attached to the mirror mounting bracket  16   a  of the interior rear view mirror assembly. 
     It is further envisioned that the audio system may include multiple microphones and/or speakers positioned at different locations within the vehicle to supplement one another in order to optimally receive and project the audio signals from and to the desired areas within the vehicle. For example, as shown in FIG. 2, one or more microphones  18  and/or speakers  42  may be positioned in module  10 , as well as in mirror housing  16   b , in mounting button  16   a , and/or within a pod  17 , which may be mounted to mirror assembly  16  and extends downwardly beneath mirror housing  16   b . Clearly, pod  17  may alternately be positioned above or to either side of mirror housing  16   b , without affecting the scope of the present invention. The microphone  18  and speaker  42  may access and/or share the electronic circuitry of an electro-optic or electrochromic mirror. By providing one or more microphones and speakers within the vehicle, the overall effectiveness of the audio system may be improved, since signals not optimally directed toward the microphone within the module, may be better received by the microphone in the pod, mirror housing, or button. 
     Referring again to FIG. 3, microphone module  10  may alternately connect to the vehicle wiring harness  28  via electrical connectors  32  and  33 . For example, a socket  33  may be provided in housing  20  of microphone module  10 , such that vehicle wiring harness  28  may include a corresponding male connector, such as a conventional twelve pin connector, which mates with socket  33 . Microphone harness  30  may then extend from socket  33  to microphone  18 , while remaining within housing  20 . Similarly, mirror harness  24  may extend from socket  33  downwardly through housing  20  and wire cover  22  to mirror assembly  16 . By connecting both the mirror harness  24  and microphone harness  30  to the vehicle harness  28  with connectors  32  and  33 , microphone module  10  further facilitates simplified installation of mirror assembly  16  within the vehicle. 
     As shown in FIGS. 3 and 4, microphone module  10  may be mechanically secured to window  12  and/or headliner  14 . For example, a bracket  34  may be bonded or otherwise adhesively secured to interior surface  12   d  of windshield  12 . Window surface  20   a  of housing  20  may then be correspondingly formed with bracket  34  to engage the bracket for removable mounting of microphone module  10  to windshield  12 . As best shown in FIG. 4, bracket  34  may include a windshield mounting surface  34   a  and a pair of mounting flanges  34   b  which are offset from the position of mounting surface  34   a  and extend laterally outwardly from a pair of sidewalls  34   c , which extend downwardly and rearwardly from mounting portion  34   a . Windshield surface  20   a  of housing  20  may then be correspondingly formed to slidably engage mounting flanges  34   b  of bracket  34 , such that housing  20  is slidable upwardly along bracket  34  until headliner surface  20   b  interfaces with headliner  14 . At that point, one or more mounting pins or fasteners  36  may be inserted through housing  20  and mounting flanges  34   b  to substantially secure the components together. Alternatively, or in addition to fasteners  36 , a headliner fastener  38  (FIG. 3) may extend through headliner surface  20   b  of housing  20  and engage a bracket  40  within headliner  14 , thereby substantially securing housing  20  to both windshield  12  and headliner  14 . Mounting fasteners  36  and  38  may be threaded fasteners or push-pin or snap fit type fasteners, to substantially secure housing  20  to the respective brackets  34  and  40 . It is further envisioned that the mounting bracket and microphone housing may be correspondingly formed to press-fit together or snap or otherwise lock together as the microphone housing is moved to the appropriate mounting location relative to the bracket. Clearly, other mounting brackets and/or fasteners may be implemented to substantially secure microphone module  10  relative to windshield  12  or headliner  14 , without affecting the scope of the present invention. 
     Referring now to FIG. 5, microphone module  10  may be implemented without a wire cover. The mirror wiring harness may extend freely downwardly from microphone housing  20  to mirror housing  16   b  or may be adhered or otherwise secured or guided along interior surface  12   b  of windshield  12  and further along arm  16   c  to mirror housing  16   b . Alternately, as shown in FIG. 5, a mirror harness  24 ′ may be implemented to provide an aesthetically pleasing spirally-coiled cord, similar to a conventional telephone cord, which extends downwardly from lower end  20   c  of housing  20  and curves rearwardly toward housing  16   b  of mirror assembly  16 . Mirror harness  24 ′ may be electronically connectable with vehicle wiring harness  28  via conventional electrical connectors  32 ′ and  33 ′, while microphone harness  30  is electronically connected with the vehicle wiring harness separately, as discussed above with reference to FIG.  2 . Clearly, however, mirror harness  24 ′ and microphone harness  30  may be connectable to vehicle wiring harness  28  by any other conventional means, without affecting the scope of the present invention. As discussed above with reference to FIGS. 2 and 3, housing  20  may be bonded to, adhesively secured or mechanically fastened to interior surface  12   b  of windshield  12  and/or to headliner  14 . 
     Although specific embodiments of the microphone module of the present invention are shown in FIGS. 2 through 5 and discussed above, clearly the scope of the present invention includes other means of mounting the microphone module and of covering or guiding the mirror harness between the microphone module and the mirror. For example, the microphone module may be mounted to the windshield between mounting button  16   a  and headliner  14  and have wire covers or the like extending from both upper and lower ends of the module to cover wires between the headliner and the module and further between the module and the mirror assembly. Alternatively, the microphone module may be mounted above and adjacent to the mirror mounting button  16   a  and include a wire cover which extends upwardly therefrom to substantially encase the wires extending from the module to the headliner for connection with the vehicle wiring harness. It is further envisioned that the microphone module may be part of a plastic wire cover extending upwardly from the interior rear view mirror assembly toward the headliner. The wiring harnesses associated with the mirror assembly and the microphone may be routed and connected with the vehicle wiring harness by any known means without effecting the scope of the present invention. The microphone and mirror assemblies may be implemented as a single component, which requires fewer assembly plant installation processes, thereby reducing the costs associated with the vehicle manufacture. 
     Although shown and described above as being implemented with a button mounted interior rearview mirror assembly, an alternate embodiment of the present invention may incorporate a mirror assembly  116  with a microphone module  110 , as shown in FIG.  8 . Microphone module  110  preferably includes a microphone  118  and a microphone housing  120 , which are substantially similar to microphone  18  and housing  20 , discussed above with respect to microphone module  10 . However, microphone module  110  further includes a mirror mounting arm  122 , which extends generally downwardly from a lower portion  120   c  of housing  120 . Mirror assembly  116  is pivotally mounted to a lower end  122   a  of arm  122  via a conventional ball and socket connection  116   a . A mirror wiring harness  124  extends from mirror assembly  116  upwardly through arm  122  and further through housing  120  and into header  14  of the vehicle for electrical connection with the vehicle wiring harness. A microphone harness  130  may also electronically connect microphone  118  with the vehicle wiring harness, as discussed above with respect to microphone harness  30 . Microphone module  110  and mirror assembly  116  may be electronically connected to the vehicle wiring harness by any known means, without affecting the scope of the present invention. Similar to microphone module  10 , a windshield surface  120   a  of housing  120  may be adhesively or mechanically secured along an interior surface  12   b  of windshield  12 . 
     As shown in FIG. 6, microphone module  10  may further include manual controls for the audio or communication device associated with microphone  18 , such as buttons  44  for activating and/or adjusting the communication device. Microphone module  10  may further include other manual controls  46  for activating or adjusting other accessories or devices within the vehicle, such as interior or exterior lights, or for selecting a function for microphone  18 , such as a cellular phone verses an emergency communication device or recording device. Mirror housing  16   b  may also include controls, buttons or switches, shown generally at  48 , for selectively activating, deactivating or adjusting one or more accessories associated with the vehicle. For example, controls  48  may activate map reading lights on mirror housing  16   b , temperature displays, compass heading displays or the like, which may be displayed on a portion of mirror housing  16   b  and are thus easily visible to the driver of the vehicle. Alternatively, however, controls  46  and  48  on microphone module  10  and mirror housing  16   b , respectively, may control accessories or lights which are located on or within the vehicle and yet are remote from microphone module  10  and mirror  16 . 
     Referring now to FIG. 7, an accessory module  10 ′ may further include multiple accessories, components or devices associated with various control systems of the vehicle and connected with a vehicle control or the vehicle wiring harness. For example, accessory module  10 ′ may include a loudspeaker  42 , a Global Positioning System (GPS) antenna  50 , a motion sensor  52 , a rain sensor  54 , a video device or camera  56 , an interior light  58 , an automatic toll booth transducer  59 , a security system status indicator  70 , a compass and/or compass sensor  51 , a temperature display and/or temperature sensor  53 , a tire pressure indicator display  55 , a seat occupancy detection antenna and/or transducer  57 , and/or any other devices, components or circuitry which may be useful to mount in accessory module  10 ′. Preferably, camera  56  is a pixelated imaging array sensor, such as a CMOS imaging array or the like, a description of which is disclosed in commonly assigned U.S. Pat. No. 5,670,935, issued to Schofield et al., the disclosure of which is hereby incorporated herein by reference. The module  10 ′ may provide a location for these devices which is highly visible and eases user interface by the driver or passengers of the vehicle. Furthermore, mirror housing  16   b  may also include electrical devices and electronic components, such as other microphones  18  and loudspeakers  42 , map reading lights  60 , compass  62 , display  64 , trip computer  66 , or other components or devices associated with the vehicle. Mirror harness  24  may provide power and/or control signals to these components or devices and may interconnect with the control circuitry of the devices and of an electrochromic mirror function control circuitry  68  for electronically adjusting the reflectivity of reflector  16   d  within mirror housing  16   b . Display  64  may display vehicle status or information displays, such as compass headings, interior or exterior temperatures, clock display, fuel level display, air bag status display, telephone dial information display, or other status displays of various components or devices associated with the vehicle. Information displayed in display  64  may be selectively displayed by an operator via controls  48  (FIG.  6 ), or may be cyclically displayed or may be displayed when there is a change in status of one of the devices. 
     It is envisioned that accessory module  10 ′ may further include multiple electrical and/or electronic components, such as those described in commonly assigned, co-pending U.S. patent application Ser. No. 08/918,772, filed Aug. 25, 1997 by Deline et al., now U.S. Pat. No. 6,124,886, and Ser. No. 09/244,726, filed Feb. 5, 1999 by Deline et al., now U.S. Pat. No. 6,172,613, the disclosures of which are hereby incorporated herein by reference. The mirror and/or the microphone module may communicate with these or other devices or components within the vehicle as part of a Car Area Network (CAN) or multiplex system, such as is disclosed in commonly assigned U.S. Pat. No. 5,798,575, issued to O&#39;Farrell et al., PCT International Application published Sep. 25, 1997 under International Publication No. WO 97/34780, by Fletcher et al., PCT International Application No. PCT/IE98/00001, filed Jan. 9, 1998 by John P. Drummond et al. and published Jul. 16, 1998 under International Publication Number WO 98/30415, the disclosures of which are hereby incorporated herein by reference, a Local Interconnect Network (LIN), or similar communications protocols, which may support the control of mechatronic nodes in automotive distributor applications. 
     Accessory module  10 ′ may also include an illumination source  70  for a vehicle security system, such as an intrusion detection system, vehicle alarm system, vehicle antitheft system, or the like. The illumination source may be an incandescent source or a nonincandescent source. Preferably, illumination source  70  is a nonincandescent, solid state source such as a light emitting diode (LED), an electro-luminescent device or the like. The illumination source  70  is operable to blink or flash intermittently when the system is armed. Typically, such systems flash the illumination source rapidly at first for up to approximately 30 seconds (or longer) after arming of the system, and then intermittently flash the illumination source for a continuous period while the system is activated (for example, once every one to two seconds), thereby alerting people within the vehicle that the security system is activated. 
     It is further envisioned that the illumination source for the vehicle security system may be included in a separate module or pod which may be mounted to the microphone or accessory module the mirror assembly, or the vehicle headliner. The illumination source module may be substantially similar to the microphone or accessory module discussed above and may clip or otherwise be mounted to the microphone module. For example, the illumination source module may snap into a mounting aperture in the microphone module or may be adhesively mounted to a side wall of the microphone housing. Alternately, the security system activation status source module may be mounted to the mirror assembly, such as to the mounting button, arm or mirror housing. The illumination source module may then be positioned below, above, or to either side of the mirror housing to facilitate viewing of the illumination source by passengers within the vehicle. The illumination source module may otherwise be mounted to the wire cover of the microphone module such that it is visible above the mirror housing. If the vehicle includes a header mounted mirror assembly, it is further envisioned that the illumination source module may be mounted to, or included as part of, the header mirror mounting bracketry or other mounting device. 
     By providing a vehicle security system illumination source module as a separate component, greater flexibility is achieved by the vehicle manufacturers. The separate security system module avoids the additional expenses required to tool two different mirror cases for vehicles with or without a security system. The optional pod or module with the illumination source may be simply installed as a vehicle option, or as an aftermarket device. Similar to the microphone and accessory modules discussed above, the illumination source module for the security system may further include other components, devices, controls or displays associated with the security system or other systems within the vehicle. It is further envisioned that other pods or modules which include one or more various components or devices associated with other systems or devices of the vehicle may be implemented to facilitate easy installation of the components of the systems either in the assembly plant or as aftermarket devices. 
     Changes and modifications in the specifically described embodiments can be carried out without departing from the principles of the invention, which is intended to be limited only by the scope of the appended claims, as interpreted according to the principles of patent law.