For improved sound radiation capability, the size and the shape of the enhancer can be modified in various ways, including a frustoconical, parabolic, or bell-shaped enhancer.

• 为了改善声音的辐射能力，特别是在中频和高频范围内的辐射能力，增强器的尺寸和形状可以有多种变化的形式，包括截锥形、抛物面形或者钟形等。