What is a braille chamber?

There's no such thing as a "braille chamber." It's possible you're thinking of a different term, or there may be a misunderstanding.

Here are some possibilities and related terms:

* Braille Cell: This refers to a single unit of braille, consisting of six dots arranged in two columns of three. Each dot can be raised or lowered, forming different combinations for letters, numbers, and symbols.

* Braille Display: This is a device that presents braille characters to visually impaired users. It typically consists of a series of pins that are raised or lowered to form the braille dots.

* Braille Embosser: This is a machine used to produce braille books and other materials. It works by pressing dots into a sheet of paper.

* Braille Library: These are libraries specifically for visually impaired individuals, offering a wide selection of braille books and other resources.

Please provide more context or information about where you encountered the term "braille chamber" so I can assist you better.