A filter that attenuates high frequencies while passing low frequencies is called a（ ）.
A: bandpass
B: bandstop
C: lowpass
D: highpass
A: bandpass
B: bandstop
C: lowpass
D: highpass
举一反三
- 4. To fix the frequency boundaries of relatively high gain, 0.7 Amid was chosen to be at the cutoff levels. The corresponding frequencies, f1 and f2, are generally called ________. A) corner frequencies B) cutoff frequencies C) half-power frequencies D) All of the above A: wrong. B: wrong. C: wrong. D: This is the right answer.
- BandPass filter是指：
- . Which of the following frequencies is as international distress and safety frequencies on MF for radio telephone? A: 2187.5 kHz B: 2174.5 kHz C: 2182kHz D: 2177. OkHz
- The filter [img=142x47]18031c9cd67f894.png[/img] is a lowpass filter
- The aphotic zone (bottom of the ocean) will have ____ and ____ while the photic zone (surface of the ocean) will have ____ and ____. A: low temperature, low salinity; high temperature, high salinity B: low temperature, high salinity; high temperature, low salinity C: high temperature, high salinity; low temperature, low salinity D: high temperature, low salinity; low temperature, high salinity E: both have equal temperature and salinity