Nec Corporation

Katsumi Shiono

Kenji Fukazawa

A microphone () is fitted with a mounting portion () of a front case () in a state being set to a microphone folder (). A metallic mesh-wise sheet () is attached to a front face of the microphone. When an EL sheet () on a rear face of the front case emits light by supplying power to it, electrical noise is radiated from the EL sheet. The mesh-wise sheet of the front face of the microphone blocks the electrical noise from the EL sheet, which may enter through a sound hole () to the inside of the microphone.

Mobile terminal and noise prevention structure of mobile terminal

By an operation in an operating unit , voice recognition, i.e., a process of recognizing voice inputted from a microphone , is started. A voice recognizing unit executes the process of recognizing voice inputted from the microphone . When the result of recognition is certified, it is displayed on a display unit , and a loudspeaker is caused to output the recognition result in voice. To prevent erroneous operation when a wind-breaking sound generated by moving a portable telephone set a handling noise generated by taking hold of the portable telephone set afresh is inputted from the microphone after the start of the voice recognition by the operation in the operating unit, recognition words for preventing erroneous operation due to noise are registered, and voice recognition is automatically started again when a recognition word for preventing erroneous operation due to noise is recognized after the recognition start.

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Saitama, Japan

Katsumi Shiono