CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims the priority, under 35 U.S.C. §119, of German patent application DE 10 2009 056 916.2, filed Dec. 3, 2009; the prior application is herewith incorporated by reference in its entirety. 
       BACKGROUND OF THE INVENTION 
     Field of the Invention 
       [0002]    The invention lies in the hearing device field and relates, more specifically, to a behind-the-ear hearing device having a hearing device housing and a switch, which can be operated from the outside of the hearing device housing. The switch is a rocker switch for instance. 
         [0003]    Hearing devices are wearable hearing apparatuses which are used to assist the hard-of-hearing. In order to accommodate numerous individual requirements, various types of hearing devices are available such as behind-the-ear (BTE) hearing devices, hearing device with an external receiver and in-the-ear (ITE) hearing devices, for example also concha hearing devices or completely-in-the-canal (CIC) hearing devices. The hearing devices listed as examples are worn on the outer ear or in the auditory canal. Bone conduction hearing aids, implantable or vibrotactile hearing aids are also available on the market. It is possible, therefore, to stimulate the damaged hearing mechanically or electrically. 
         [0004]    The major components of hearing devices are principally an input converter, an amplifier and an output converter. The input converter is normally a receiving transducer, such as a microphone and/or an electromagnetic receiver, such as an induction coil. The output converter is most frequently realized as an electroacoustic converter e.g. a miniature loudspeaker, or as an electromechanical converter e.g. a bone conduction hearing aid. The amplifier is usually integrated into a signal processing unit. This basic configuration is illustrated in  FIG. 1  using the example of a behind-the-ear hearing device  1 . Two microphones  3  for recording ambient sound are built into a hearing device housing  2  to be worn behind the ear. Microphone openings  7  in the hearing device housing  2  are embodied above the microphone  3 . Sound can reach the microphones  3  inside the hearing device housing through the sound openings  7 . A signal processing unit  4  (SPU) which is also integrated into the hearing device housing  2  processes and amplifies the microphone signals. The output signal for the signal processing unit  4  is transmitted to a loudspeaker or receiver  5 , which outputs an acoustic signal. Sound is transmitted through a non-illustrated sound tube, which is affixed in the auditory canal by means of an otoplastic, to the device wearer&#39;s eardrum. Power for the hearing device  1  and in particular for the signal processing unit  4  is supplied by way of a battery  6  which is also integrated in the hearing device housing  1 . 
         [0005]    Commonly assigned patent application publication US 2010/0260366 A1 and its counterpart German application DE 10 2008 018 041 A1 disclose a behind-the-ear hearing device of this type having a microphone opening, with a volume controller, a programmer socket, a program button with an off function, and a battery compartment. 
       SUMMARY OF THE INVENTION 
       [0006]    It is accordingly an object of the invention to provide a behind-the-ear hearing device which overcomes a variety of the disadvantages of the heretofore-known devices and methods of this general type and wherein the provision of a larger switch, for instance a rocker switch, does not necessarily result in an enlargement of the hearing device housing. 
         [0007]    With the foregoing and other objects in view there is provided, in accordance with the invention, a behind-the-ear hearing device, comprising:
       a hearing device housing;   a switch partially disposed within the hearing device housing;   at least two microphones disposed in the hearing device housing underneath said switch; and   sound openings formed in the hearing device housing underneath the switch.       
 
         [0012]    In other words, the objects of the invention are achieved by way of a behind-the-ear hearing device having a hearing device housing and a switch. The switch is partially located within the hearing device housing. The arrangement also includes at least two microphones, which are arranged below the switch in the hearing device housing, and first sound openings in the hearing device housing, which are arranged below the switch and are concealed thereby. The invention is advantageous in that microphones can be positioned below a switch in a space-saving fashion and the installation space of the hearing device housing can thus be used optimally. 
         [0013]    In a development of the invention, the hearing device can include second sound openings in the switch. Ambient sound can advantageously reach the first sound openings through the second sound openings. 
         [0014]    In a further embodiment, the hearing device includes third sound openings in the hearing device housing adjacent the switch. Ambient sound can advantageously reach the first sound openings through the third sound openings. 
         [0015]    Furthermore, the first sound openings can be arranged such that ambient sound can reach the microphones through the first sound openings. 
         [0016]    The switch can advantageously be a rocker switch, which is arranged in the longitudinal direction of the hearing device housing. With the aid of rocker switches, the direction of the switching movements can be simply and reliably changed. 
         [0017]    In a development of the invention, the rocker switch can comprise four second sound openings, which are arranged in pairs on the left and right sides of the rocker switch. The ambient sound advantageously reaches a cavity of the rocker switch through said openings. 
         [0018]    In a further embodiment, the microphones can comprise microphone protection systems, which are arranged directly below the first sound openings. 
         [0019]    With the above and other objects in view there is also provided, in according to the invention, a behind-the-ear hearing device having a hearing device housing and a switch, which is partially arranged within the hearing device housing, with at least two microphones being arranged below the switch in the hearing device housing. The hearing device housing comprises (fourth) sound openings, which are arranged adjacent to the switch such that ambient sound can reach the microphones through the fourth sound openings. 
         [0020]    In similarity to the first-mentioned embodiment, the switch may be a rocker switch, which is arranged in the longitudinal direction of the hearing device housing. 
         [0021]    In accordance with a concomitant feature of the invention, the hearing device housing can comprise four such sound openings, which are arranged in pairs to the left and right in the longitudinal direction of the rocker switch. 
         [0022]    Other features which are considered as characteristic for the invention are set forth in the appended claims. 
         [0023]    Although the invention is illustrated and described herein as embodied in a hearing device with a space-saving arrangement of microphones and sound openings, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims. 
         [0024]    The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING 
         [0025]      FIG. 1  shows a behind-the-ear hearing device according to the prior art; 
           [0026]      FIG. 2  shows an oblique view of part of a behind-the-ear hearing device housing having a rocker switch and sound openings in the rocker switch; 
           [0027]      FIG. 3  shows a sectional view of the hearing device housing having a rocker switch shown in  FIG. 2 ; 
           [0028]      FIG. 4  shows a further sectional view of the hearing device housing having a rocker switch shown in  FIG. 2 ; 
           [0029]      FIG. 5  shows an oblique view of part of a further behind-the-ear hearing device housing having a rocker switch and sound openings in the hearing device housing; 
           [0030]      FIG. 6  shows a sectional view of the hearing device housing having a rocker switch shown in  FIG. 5 ; 
           [0031]      FIG. 7  shows a further sectional view of the hearing device housing having a rocker switch shown in  FIG. 5 ; 
           [0032]      FIG. 8  shows an oblique view of part of a further behind-the-ear hearing device housing having a rocker switch and sound openings in the hearing device housing; 
           [0033]      FIG. 9  shows a sectional view of the hearing device housing having a rocker switch shown in  FIG. 8 ; and 
           [0034]      FIG. 10  shows a further sectional view of the hearing device housing having a rocker switch shown in  FIG. 8 . 
       
    
    
     DESCRIPTION OF THE INVENTION 
       [0035]    Referring now once more to the figures of the drawing in detail, and particularly to  FIGS. 2 to 4  thereof, there is shown an exemplary embodiment of a behind-the-ear hearing device according to the invention. Here, ambient sound can reach openings in the hearing device housing of the hearing device that are disposed below the rocker through openings in a rocker. The ambient sound finally reaches microphones mounted below the rocker in the hearing device housing through the openings in the hearing device housing. 
         [0036]      FIG. 2  shows an oblique view of part of a hearing device housing  10  of a behind-the-ear hearing device and a rocker switch  15 . The rocker  16  of the rocker switch  15  is visible, said rocker being moveable in order to actuate the switching contacts. In the visible side  20  of the rocker  16 , two second sound openings  12  are recessed, through which the ambient sound can reach into a non visible cavity of the rocker switch  15  below the rocker  16 . Second sound openings  12  are likewise arranged on the non visible opposite sides of the rocker  16  in symmetry with the two visible second sound openings  12 . 
         [0037]      FIG. 3  shows a cross-section through a part of a hearing device housing  10  and through a rocker switch  15 . The rocker  16  of the rocker switch  15  comprises second sound openings  12 , through which the ambient sound reaches a cavity of the rocker  16 . A microphone  21  is arranged in the hearing device housing  10 . Above a microphone protection system  22  of the microphone  21 , the hearing device housing  10  comprises several first sound openings  11 , through which the ambient sound can reach the microphone  21  from the cavity of the rocker  16 . 
         [0038]      FIG. 4  shows a longitudinal section through a part of a hearing device housing  10  and through a rocker switch  15 . Two microphones  21  are mounted below the rocker switch  15  in the hearing device housing  10 . First sound openings  11  are disposed above the microphone protection systems  22  of the microphone  21 . The rocker switch  15  includes a rocker  16 , a switching tongue  17  and a swivel  18 , with which the rocker switch  15  is rotatably mounted to a limited degree. The switching tongue  17  enables two buttons  19  arranged in the hearing device housing  10  to be actuated. The rocker switch  15  therefore effects a 90° change in direction of a switching movement. The rocker  16  comprises second sound openings  12  on its sides above the microphone  21 . The ambient sound reaches the first sound openings  11  and the microphone protection systems  22  of the microphone  21  herethrough. 
         [0039]      FIGS. 5 to 7  show a further inventive exemplary embodiment of a behind-the-ear hearing device, in which an ambient sound can reach openings in the hearing device housing which are disposed below a rocker through openings arranged laterally in a hearing device housing of the hearing device. The ambient sound finally reaches microphones mounted below the rocker in the hearing device housing through these openings in the hearing device housing. 
         [0040]      FIG. 5  shows an oblique view of part of a hearing device housing  10  of a behind-the-ear hearing device and a rocker switch  15 . The rocker  16  of the rocker switch  15  is visible, said rocker being moveable in order to actuate the switching contacts. In the visible side of the hearing device housing  10 , two third sound openings  13  are recessed below the rocker  16 , through which the ambient sound can reach into a non-visible cavity in the rocker  16 . Third sound openings  13  are likewise arranged on the non visible opposite side of the hearing device housing  10  in symmetry with the two visible third sound openings  13 . 
         [0041]      FIG. 6  shows a cross-section through a part of a hearing device housing  10  and through a rocker switch  15 . The hearing device housing  10  comprises third sound openings  13  to the left and right of the rocker switch  15 , through which sound openings  13  the ambient sound reaches a cavity of the rocker  16  of the rocker switch  15 . A microphone  21  is arranged in the hearing device housing  10  below the rocker  16 . Above a microphone protection system  22  of the microphone  21 , the hearing device housing  10  comprises several first sound openings  11 , through which the ambient sound can reach the microphone  21  from the cavity of the rocker  16 . 
         [0042]      FIG. 7  shows a longitudinal section through a part of a hearing device housing  10  and through a rocker switch  15 . Two microphones  21  are arranged below the rocker switch  15  in the hearing device housing  10 . First sound openings  11  in the hearing device housing  10  are disposed above the microphone protection systems  22  of the microphone  21 . The rocker switch  15  includes a rocker  16 , a switching tongue  17  and a swivel  18 , with which the rocker switch  15  is rotatably mounted to a limited degree. The switching tongue  17  enables two buttons  19  arranged in the hearing device housing  10  to be actuated. The rocker switch  15  therefore effects a 90° change in direction of a switching movement. The hearing device housing  10  comprises third sound openings  13  on its sides above the microphone  21 . The ambient sound reaches the first sound openings  11  herethrough and the microphone protection systems  22  of the microphone  21  therethrough. 
         [0043]      FIGS. 8 to 10  show a further inventive exemplary embodiment of a behind-the-ear hearing device, in which an ambient sound can reach microphones in the hearing device housing, which are disposed below a rocker, through openings disposed laterally in a hearing device housing of the hearing device. 
         [0044]      FIG. 8  shows an oblique view of part of a hearing device housing  10  of a behind-the-ear hearing device and a rocker switch  15 . The rocker  16  of the rocker switch  15  is visible, said rocker being moveable in order to actuate the switching contacts. In the visible side  10  of the hearing device housing  10 , two fourth sound openings  14  are recessed below the rocker  16 , through which the ambient sound can reach a non visible microphone disposed below the rocker  16 . Fourth sound openings  14  are likewise arranged on the non visible opposite side of the hearing device housing  10  in symmetry with the two visible fourth sound openings  14 . 
         [0045]      FIG. 9  shows a cross-section through a part of a hearing device housing  10  and through a rocker switch  15 . The hearing device housing  10  comprises fourth sound openings  14  to the left and right of the rocker switch  15 , through which sound openings  13  the ambient sound reaches a microphone protection system  22  of a microphone  21 . The microphone  21  is mounted in the hearing device housing  10  below the rocker  16  of the rocker switch  15 . 
         [0046]      FIG. 10  shows a longitudinal section through a part of a hearing device housing  10  and through a rocker switch  15 . Two microphones  21  are arranged below the rocker switch  15  in the hearing device housing  10 . The rocker switch  15  includes a rocker  16 , a switching tongue  17  and a swivel  18 , with which the rocker switch  15  is rotatably mounted to a limited degree. The switching tongue  17  enables two buttons  19  arranged in the hearing device housing  10  to be actuated. The rocker switch  15  therefore effects a 90° change in direction of a switching movement. The hearing device housing  10  comprises fourth sound openings  14  on its sides at the height of the microphone protection system  22  of the microphone  21 . The ambient sound reaches the microphone protection systems  22  of the microphone  21  therethrough. 
         [0047]    Instead of a rocker switch, other types of switches, such as, for instance a sliding switch, can also be used. 
         [0048]    It will be understood that the hearing device housing  10  may be embodied in several parts from shells.
A behind-the-ear hearing device has a hearing device housing and a user-operable switch. At least two microphones are disposed below the switch in the hearing device housing, and the housing is formed with first sound openings that are arranged directly below the switch. The switch is preferably a rocker switch. The microphones can be positioned below a switch in a space-saving fashion and the installation space of the hearing device housing can thus be used optimally.