Visual systems with a fovea are the most familiar, but auditory systems can have an acoustic fovea as well, as has been 视觉系统发展出中央窝是最为人所熟知的例子，而听觉系统同样也可以有中央窝，美国密苏里州华盛顿大学的菅乃武男已经以髭蝠为例，漂亮地证实了这一点。