HTP funnel, has high-pass filter and low-pass filter, where membrane area of driver for high-pass filter is one quarter of membrane area of driver of low-pass filter, and funnel factor of high-pass filter is two to one

摘要

The funnel has a high-pass filter and a low-pass filter, where a membrane area of a driver of the low-pass filter is close to 442 square cm, and a funnel factor of the high-pass filter is two to one. A driver for the high pass includes a membrane area of one quarter of that of the low-pass filter, where an upper cutoff frequency of the low-pass filter and a lower cutoff frequency of the high-pass filter have a value of about 442 hertz.