The decibel range for five bars of reception is so large because precise measurement in such an area is less important than in areas with poor reception .
五格信号强度的分贝范围很大，因为在信号好的地方精确测量信号并没有在信号差地方测量那么重要。
Obviously , you 'd wonder why the iphone wouldn 't measure signal in a more linear fashion , where the decibel value for each bar is equal .
