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Speech Reinforce Inside Vehicles

Speech reinforce inside vehicles has the goal of improving the oral communication inside vehicles. These speech reinforce systems are also known as Cabin Car Communication Systems (CCCS). Communication can be difficult due to the distance among passengers, the lack of visual contact between speakers, the high level of noise and many other factors. To achieve speech reinforce, CCCS makes use of a set of microphones to pick up the speech of each passenger, afterwards it amplifies these signals and plays them back through the car audio loudspeaker system. This configuration presents two main problems, electro-acoustic coupling and noise amplification. To overcome these problems, CCCS makes use of a set of acoustic echo cancellation systems and noise reduction stages. In this paper a description of a two channel CCCS is shown along with some simulated and experimental results.

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