A banjo bridge is the single member of a banjo that transfers the energy from the vibrating strings to the head of the instrument… but it is also a filter. The material the vibrations move through can enhance the tone, balance and power or they can dampen it. It can also make it muddy, thin or off-balance.

I actually found the best definition of a banjo bridge in the book Banjo for Dummies by Bill Evans. On page 243 he says, “The bridge is a piece of wood, (usually with 3 contact points, called feet) that sits on top of the head and transmits the vibrations from the strings that rest on top if it to the head and the rest of the banjo.”

The banjo bridge does exactly as its name suggests, it forms a bridge for the strings to pass over the banjo head and transmits sound from your strings into the banjo head. Bridges are available in different heights and they are measured in imperial measurement.