A power line carrying high-voltage electricity between regions Most transmission lines are built on steel towers and operate at voltages between 60 and 765 kV, (60,000 to 765,000 Volts )
The venting of loudspeaker drivers into a progressively damped rear chamber or labyrinth to absorb the rear wave Full transmission lines are very long to accommodate the wavelengths of bass notes, and are thus usually folded Half- or quarter transmission lines reduce the size of the associated cabinet and are more common Transmission lines in general entail complex cabinet construction and are thus relatively rare Examples of TL loaded speakers include Chapman Acoustics, Meadowlark Audio, most designs by "Bud" Fried and others
On PCBs, a term referring to designing track layout to have an accurately defined Track Impedance, often consisting of a pair of conductors (either differential or signal and return) running in parallel See also Stripline and Microstrip
Also referred to as a T-line A type of bass cabinet in which the back wave follows a relatively long, usually damped path before being ported to the outside T-lines are usually rather large and costly cabinets to manufacture Opinions vary widely over the "best" type of bass cabinet, but much has to do with how well a given design, such as a transmission line is implemented
The material medium or structure that forms all or part of a path from one place to another for directing the transmission of energy, such as electric currents, magnetic fields, acoustic waves, or electromagnetic waves Note: Examples of transmission lines include wires, optical fibers, coaxial cables, rectangular closed waveguides, and dielectric slabs
A pipeline, other than a gathering or distribution line, that transports gas from a gathering or storage facility to a distribution center or storage operates at a hoop stress of 20 percent or more of the specified minimum yield stress of the pipe, or transports gas within a storage field (See 49 Code of Federal Regulations 192)