滤波器Q值

Q值是滤波器的品质因数，定义为中心频率除以滤波器带宽，如常规的31段均衡器，有100HZ、125HZ和160HZ几个频点，中心频率为125HZ，125HZ这个滤波器的Q值就为：125/（160-100）=2.08，Q值越小影响的可调带宽就越大，图示均衡器每个滤波器的Q值是固定的

 

Q factor[edit]

A band-pass filter can be characterised by its Q factor. The Q-factor is the inverse of the fractional bandwidth. A high-Q filter will have a narrow passband and a low-Q filter will have a wide passband. These are respectively referred to as narrow-band and wide-band filters.

 

https://en.wikipedia.org/wiki/Band-pass_filter