RELATIONSHIP BETWEEN BANDWIDHT AND CENTRE FRQ:
FC = F1xF2之后的开方
B = F1-F2
QUALITY FACTOR:
Q= fc/(f2-f1)
Octave equation:
FH/FL = 2的n次方
where:
Q = quality factor
B = bandwidth
Fc = centre freq.
F1 = lower freq.
F2 = higher freq.
N = numbers of semitones