Headroom
01
动态余量, 功率储备
the capacity of a system to reproduce loud sounds without distortion
02
净空, 垂直空间
vertical space available to allow easy passage under something
03
头部空间, 头顶空间
the space between the top of the subject's head and the top edge of the image frame, and is an important compositional element that can affect the balance and aesthetic appeal of the image
