An animal trap for restraining animals, such as raccoons. The conductive layer defines at least one groove inwardly extending from an upper surface and includes an aperture that is spaced apart from the at least one groove. The wireless transmitting and receiving sensors are respectively disposed at first, second and third positions of the screen. The radially spaced profile sections are joined smoothly with one another to form the nominal airfoil profile. An input signal from an input to the trackpad input device may be smoothed by filtering out a mechanical vibration signal within the input signal. Amorphous phase cellulose is removed from the paper.