Question

____________ filter amplifies signals below a certain frequency.

(a) band stop filter

(b) high pass filter

(c) band pass filter

(d) low pass filter

The question was asked at a job interview.

My question comes from Writing System in division Recording System of Biomedical Instrumentation

Answer 1

Right choice is (d) low pass filter

Best explanation: Low pass filter amplifies signals below a certain frequency. Band pass filter amplifies frequencies with in a certain band. Band stop filter amplifies all the frequencies except those in a certain band. High pass filter amplifies signal above a certain frequency.