Descr iption:15th order band pass 6kHz to 7kHz FIR filter frequency: 4kHz 5kHz 5.5kHz 6kHz 6.5kHz 7kHz 7.5kHz 8kHz dB loss: -60dB -45dB -13dB -3dB 0dB -3dB -13dB -45dB. -Descr iption:15th order band pass 6kHz to 7kHz FIR filter frequency: 4kHz 5kH