What is springiness?

  • (noun): The elasticity of something that can be stretched and returns to its original length.
    Synonyms: give, spring

Some articles on springiness:

Bass Reflex - Explanation
... The air mass in this opening resonates with the "springiness" of the air inside the enclosure in exactly the same fashion as the air in a bottle resonates when a current of air is directed across the opening ... When this vent air mass/box air springiness resonance is so chosen as to lie lower in frequency than the natural resonance frequency of the bass driver, an interesting phenomenon ... Furthermore the driver behaves as though suspended in free air, as box air springiness is absent ...