If you have edited your question, I have more space. The same as a parabolic microphoneEvery mirror lens does exactly the same thing. It takes parallel rays from a distance and focuses them on a smaller point … the focal point.
Ever heard of the Hubble telescope? A mirror lens collects light.
The James Web Telescope I mention this particular telescope because it is used a series of mirrors… to collect more light, but the overall shape is a section of a parabolic mirror. The array is not intended as an additional attachment, but as such, planned from the beginning because this light must be focused in exactly the same place.
But an optical lens also collects light. The bigger, the better, that's why a large aperture collects more light than a smaller one.
A slow shutter speed gives the sensor more time to collect light.
I understand your analogy to a parabolic microphone. However, there are some differences.
Yes, you can have parabolic mirroring material … a wall, a fruit plate or a special plastic parabolic attachment … and a microphone. This microphone can actually work independently of the parabolic attachment to find closer sounds.
The pure sensor corresponds to the microphone diaphragm. But one difference is that it requires a focused beam to actually work.
This appendix does not work just because …
We actually build parabolic lenses that are equivalent on a parabolic "microphone" (again, the parabolic is a different mount than the actual microphone).
Each large telescope is a reflector telescope, but you do not place the camera in front of the reflector, but set up an additional mirror to leave the camera behind.
On a smaller scale, every mirror lens, usually a telephoto lens, is exactly the same principle: collecting light … the bigger the better, but the bigger, the bigger the volume, so you can limit the size to a manageable lens.
But also the normal lenses. However, they do so by breaking light rather than reflecting it. The bigger the lens, the more light it can collect.
The purpose of a lens is to collect more light … more light than what? You can ask …
The simpler camera without lens is a pinhole camera … but the area that receives light must be very small to produce a decent image.
Here is a side-by-side comparison of a device to collect more light … The first is not to scale …
Each lens is a device that can record more light than a smaller one.
I also mentioned the shutter speed,
With a static object with a fixed camera (tripod), you can gather more light to give the photo more time … But this does not work with sound waves because the sound is completely time-dependent. The sound is a vibration and its frequency is vibrations per second. The resulting file or recording must be reproduced over time (duration of recording).
But photography compresses time … You can collect photons over 22 days to create a single photo.