Wireless Telephone System with Acoustic Proximity Routing
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Solution Overview
Problem
Wireless telephone systems in multi-room environments face limitations in hands-free operation due to energy-intensive amplifier power and limited battery life, requiring users to pick up handsets when moving out of acoustic proximity, which affects comfort and conversation continuity.
Innovation Solution
A telephone system with a base station connected to stationary display devices and sensor devices that automatically forward incoming voice signals to the nearest playback device, eliminating the need for loudspeakers in mobile parts, allowing hands-free operation with extended battery life and enabling seamless conversation across rooms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hands-free operation with loudspeaker playback is used in mobile part, then convenience is improved, but energy consumption increases
Solution Approach 1:
The loudspeaker and amplifier functions are extracted from the mobile part and relocated to a stationary playback device. The mobile part only contains the microphone, eliminating the energy-intensive playback components while maintaining hands-free operation capability. This resolves the contradiction by removing the harmful energy consumption while preserving the convenient hands-free functionality.
2Ease of operation
If loudspeaker is included in mobile part for hands-free mode, then conversation continuity is improved, but device size increases
Solution Approach 1:
The loudspeaker component is extracted from the mobile part and placed in a stationary playback device. The mobile part becomes a compact microphone-only device that can be worn or carried, while the playback function resides in the fixed infrastructure. This maintains conversation continuity through the stationary speaker while dramatically reducing mobile part size.
3Adaptability or versatility
If mobile part plays back voice signals, then communication functionality is complete, but operating time is limited
Solution Approach 1:
The voice signal playback function is extracted from the mobile part and assigned to the stationary playback device powered by permanent power supply. The mobile part only performs microphone and signaling functions, which consume minimal energy. This extends battery operating time significantly while maintaining complete communication functionality through the distributed system architecture.
4Ease of operation
If automatic forwarding to display device is implemented, then user comfort is improved, but system complexity increases
Solution Approach 1:
The base station acts as an intermediary that automatically routes voice signals between the mobile part and the appropriate stationary display device. The sensor device detects acoustic proximity and provides input to the base station's routing logic. This automatic forwarding mechanism improves user comfort by eliminating manual device selection while the distributed architecture keeps individual device complexity low.
Data Source
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AI summary
The telephone system has a sensor unit (110) for determining the acoustic distance between a mobile unit (200) and a stationary display device (310), where the sensor unit is connected to a base station (100). The base station has a unit (700) for transmitting an incoming speech signal (615) to a display device (310). An independent claim is also included for a method for operating telephone system.