headroom

Noun
  1. Vertical space available to allow easy passage under something (synset 113800473)
    is a type of: elbow room, room, way - space for movement
    same as: clearance, headway
  2. The capacity of a system to reproduce loud sounds without distortion (synset 101022570)
    is a type of: hi-fi, high fidelity - the reproduction of sound with little or no distortion
    same as: dynamic headroom

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