发明授权
- 专利标题: Modulator processing for a parametric speaker system
- 专利标题(中): 用于参数扬声器系统的调制器处理
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申请号: US11651944申请日: 2007-01-09
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公开(公告)号: US07729498B2公开(公告)日: 2010-06-01
- 发明人: Michael E. Spencer , James J. Croft, III , Joseph O. Norris
- 申请人: Michael E. Spencer , James J. Croft, III , Joseph O. Norris
- 申请人地址: US CA San Diego
- 专利权人: American Technology Corporation
- 当前专利权人: American Technology Corporation
- 当前专利权人地址: US CA San Diego
- 代理机构: Thorpe North & Western LLP
- 主分类号: H04B3/00
- IPC分类号: H04B3/00
摘要:
A parametric loudspeaker system using improved modulators to compensate for the non-linearity of the parametric process in air when driving the air at saturation levels and below saturation levels. The parametric loudspeaker uses a pre-processed single sideband modulator that offers ideal linearity as characterized by square root pre-processed double sideband modulators but with a lower carrier frequency and without the wide bandwidth requirements. By eliminating some or all of the lower sideband the carrier frequency can be reduced without producing sideband frequencies in the audible range. Lower operational frequencies result in greater translation efficiency and greater output capability before reaching the saturation limit of air. A pre-processor minimizes the effects of saturation limits for double sideband, truncated double sideband or single sideband processing to achieve superior output.
公开/授权文献
- US20080063214A1 Modulator processing for a parametric speaker system 公开/授权日:2008-03-13
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