Hand-free operated mobile communcation terminal apparatus
A mobile communication terminal and a communication terminal technology are applied in the field of mobile communication terminal equipment in hands-free operation, and can solve problems such as inability to radiate sound energy and large space for hands-free speakers.
Inactive Publication Date: 2003-10-22
SIEMENS AG
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Problems solved by technology
[0005] Therefore, based on the large space required for the hands-free speaker of the mobile communication terminal equipment, the second speaker arranged on its back cannot radiate its sound energy to the direction of the user of the communication terminal equipment.
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Embodiment Construction
[0016] The signal received by antenna A is directed to a signal processing unit SV which processes the received signal and feeds it to 2 loudspeakers L1, L2.
[0017] The first loudspeaker L1 is used in the normal operation of the mobile communication terminal equipment containing the unit, and is arranged on its front. In this normal operation as described, the full spectrum of the received signal is radiated through the loudspeaker L1.
[0018] The loudspeaker L2 integrated on the rear of the communication terminal is intended for hands-free operation. Acoustic radiation takes place through openings in the rear of the housing of the communication terminal. In hands-free operation, the signal processing device SV divides the received signal into a high-frequency part above 1 kHz and a low-frequency part below 1 kHz, wherein the high-frequency part is fed to the first loudspeaker L1 and the low-frequency part to the second loudspeaker L2.
[0019] A separate amplifier is spe...
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A mobile communications terminal is provided having a first loudspeaker L1 for emitting sound signals in a normal mode of the communications terminal, a second loudspeaker L2 for emitting sound signals in a hands-free mode of the communications terminal, an antenna A and a signal processing device SV for processing signals which have been received by the antenna and for supplying processed signals to the first loudspeaker L1 and to the second loudspeaker L2 depending on whether the communications terminal is in the normal mode or in the hands-free mode, wherein better high-frequency reproduction in a hands-free mode is achieved in that, in the hands-free mode, the signal processing device is designed to supply processed signals at a frequency of more than 1 kHz to the first loudspeaker L1 and the first loudspeaker L1 is designed to reproduce sound signals at a frequency of more than 1 kHz. The present invention also relates to a method of radiating sound signals for a mobile communications terminal.
Description
technical field [0001] The invention relates to a mobile communication terminal having a first loudspeaker for outputting an acoustic signal for the normal operation of the communication terminal, a second loudspeaker for outputting an acoustic signal for the hands-free operation of the communication terminal, an antenna and a signal processing device to process the signal received by the antenna and deliver the processed signal to the first and second loudspeakers, which will depend on whether the communication terminal equipment is in normal operation or in hands-free operation, the invention also relates to the use of communication The method by which terminal equipment radiates acoustic signals. Background technique [0002] A mobile communication terminal of the type described above can be used not only in normal operation, in which the communication terminal is placed close to the user's head, but also in hands-free operation, in which the user's head is away from the ...
Claims
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IPC IPC(8): H04M1/60
CPCH04M1/605
Inventor R·奥保尔M·许尔斯克姆佩尔S·A·克林克F·罗伦茨C·佩尔施曼
Owner SIEMENS AG