AIR HOG AIR FILTER

Helical Bandpass Filter

bandpass filter


A band-pass filter is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range. An example of an analogue electronic band-pass filter is an RLC circuit (a resistor–inductor–capacitor circuit).


A filter that attenuates signals both below and above the desired passband.


An electric circuit designed to pass only middle frequencies.

helical


Having the shape or form of a helix; spiral


(A-helices) A common motif in the secondary structure of proteins, the alpha helix (±-helix) is a right-handed coiled or spiral conformation, in which every backbone N-H group donates a hydrogen bond to the backbone C=O group of the amino acid four residues earlier (hydrogen bonding).


A helix (pl: helixes or helices) is a type of space curve, i.e. a smooth curve in three-dimensional space. It is characterised by the fact that the tangent line at any point makes a constant angle with a fixed line called the axis.


coiling: in the shape of a coil