发明授权
- 专利标题: Handset proximity muting
- 专利标题(中): 手机接近静音
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申请号: US09590684申请日: 2000-06-09
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公开(公告)号: US06952471B1公开(公告)日: 2005-10-04
- 发明人: Joseph M. Cannon , James A. Johanson , Philip D. Mooney
- 申请人: Joseph M. Cannon , James A. Johanson , Philip D. Mooney
- 申请人地址: US PA Allentown
- 专利权人: Agere Systems Inc.
- 当前专利权人: Agere Systems Inc.
- 当前专利权人地址: US PA Allentown
- 主分类号: H04M1/72
- IPC分类号: H04M1/72 ; H04M1/725
摘要:
Apparatus and methods for automatically (i.e., without requiring manual user adjustment) reducing gain in one or both acoustic feedback paths of a cordless telephone when the handset and its base unit are operating in close proximity to one another, preventing uncontrolled feedback and audible howling even before it begins. A proximity detection module determines a distance between the handset and its base unit using an appropriate technique, e.g., using RSSI, round trip delay times, and/or GPS measurements. If the distance indicates that the handset is within close proximity to the base unit, appropriate attenuation of the microphone gain and/or speaker volume of the base unit and/or the handset will be implemented. One or more fixed levels of attenuation may be implemented based on a corresponding one or more measured close proximity distances between the handset and its base unit. Thus, the attenuation may result in a muting, a fixed amount of attenuation (e.g., 6 decibels (dB), 12 dB, or other appropriate fixed amount), or may be a variable amount dependent upon a relationship to the distance between the handset and the base unit.
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