A buffer is a device that kills, retain, or depressed.

Buffer is:

    Shock, a type of hydraulic or mechanical Dampers,
    developed shock (British or technical purposes: Torsion damper), a mechanical device to dissipate the kinetic energy
     In the electronic system determines a type of diode to absorb energy, usually generated by the inductive circuit

In music:

    A device for different keyboard instruments to dampen vibration of the strings
    A silent for several wind instruments, see: Mute (music)
    A damper or sustain pedal, a device that sounds silly, especially in the strings

In the structures:

     Damper (mast), a device that dampens vibrations on masts and towers for better protection against storms
    vibration damper mounted on an aircraft structure in order to prevent discomfort, damage or structural failure by vibration
    Strut (RSS), a mechanical device in a well or a chimney that regulates the air flow

Buffer is:

    Damper (food), soda bread, the Australian Outback
    Damper (HVAC), HVAC Terminology
    Bers, an element of condensing technology used to control fire