A flow meter is disclosed that is comprised of a base, a driver, pick-offs, and a flow tube made from a fluoropolymer substance. A sound source localization method includes receiving a signal as an input from a sound source; decomposing the signal into time, frequency and amplitude using a sparse coding; extracting an SITD for each frequency; and localizing the sound source using the SITDs. A pair of rigid, U-shape frames are rotatively connected together to form an A-frame shaped support. The force sensor includes an upper capacitive plate and a compressible element disposed on one side of the upper capacitive plate.