Hands-free Operation of a Handset with Inlet Access through the Bottom of the Desktop Stand
Original Publication Date: 2003-Jul-25
Included in the Prior Art Database: 2003-Jul-25
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This invention describes a way of enabling hands-free operation of a mobile handset with microphone inlet holes at the bottom and/or in the back of the handset. The solution presented adds access to the microphone inlets via a gap in the base of the desktop stand. So far, in order to avoid that the direct path from the sound source to the microphone inlet is blocked when the handset is placed in the desktop stand, at least one microphone inlet had to be placed in the front of the handset (fig. 1). Though this solution is very simple and does not require any additional tuning, it is often undesirable to have an inlet hole placed in the front of the handset since this may interfere with the performance of the microphone. Also the inlets at the back and at the bottom of the handset need to stay uncovered to preserve an unidirectional characteristic.