| 摘要 |
<p>A microphone mounting arm assembly (10) for vehicles (12) is provided, whereby a microphone element (94) for wireless communications such as cellular telephones, or citizens' band or two-way radios, is installed in the vehicle in such a manner that the microphone element may be selectively positionable near the mouth (15) of the user (14) so that the radio frequency operating device may be used for speech in a hands-free manner. The microphone mounting arm assembly is folded up, out of the way, typically over the driver's door, and is adjusted by various pivotal and swivel movements, telescopic arm length extension, and by a gooseneck (48) for final positioning of the microphone in the region of the mouth of the driver. The voice wires (106, 108), and power wires (114, 116) for the microphone element when it is a condenser microphone, pass through the microphone mounting arm assembly so as to provide radio frequency shielding therefor. The microphone mounting arm assembly is mounted on an electrical insulating base (20) so that it is electrically isolated from the body of the vehicle, and so as to preclude hum due to ground loops occurring in the audio frequency portion of the telephone or radio installation in the vehicle. A mounting clip (22) is provided so that the microphone mounting arm assembly may be removably installed in the vehicle without the necessity for drilling holes, by being mounted to door trim or the head liner of the vehicle. Superior voice transmission from the vehicle to the party being called is achieved, in a hands-free operating mode, without obscuring the driver's vision.</p> |
