[BRLTTY] Pneumatic braille based on balls in a tube

[Mario Lang]

<timothyhobbs at seznam.cz> writes:

> How will the pneumatic braille system work?

Without having read your complete message, I'd like to raise two
questions:

1. Have you researched the history of braille displays?  I have a vague
rememerance that a pneumatic system has already been tried.

2. How do you plan to deal with noise?  As a full-time braille user (8
to sometimes 16 hours a day) I can not really imagine using a pneumatic
system since this will likely generate quite a bit of noise which will
be a problem for me personally, and for my co-workers sitting in the
same office as I do.

-- 
CYa,
  ⡍⠁⠗⠊⠕