A FILTER which passes the entire frequency range except for a set of very narrow BANDs, spaced usually at equal distances (on either a linear or logarithmic scale). The roll-off at each of these ...
Innovative Products of America says its Air Comb Filter and Radiator Cleaner effectively cleans cylindrical-style air filters, radiators, condensers and other hard-to-reach pieces of equipment in ...
A bandpass filter used to process audio and video signals by mixing the original with a delayed signal. Comb filters allow selected frequencies to pass while blocking their harmonics and all other ...