Donnable barrier devices, systems, and methods with touchless control

A method of controlling a device inside a barrier system comprising a head unit, a hood, one or more sensors, and a controller, the method comprising:

• (a) sensing one or more characteristics;
• (b) producing one or more sensor signals based on the sensed one or more characteristics;
• (c) converting and/or processing the one or more sensor signals to produce one or more controller-output signals;
• and
• (d) controlling the device based on the one or more controller-output signals.

A barrier device, comprising:

• a head unit shaped to be worn over the head of the wearer;
• a hood positioned over the head unit and forming a chamber;
• one or more sensors located within the chamber and configured to produce one or more sensor-output signals;
• and
• a controller connected to the one or more sensors and configured to produce one or more controller-output signals based on the one or more sensor-output signals.

An apparatus for controlling a device inside a barrier system comprising a head unit, a hood, one or more sensors, and a controller, the apparatus comprising:

• (a) means for sensing one or more characteristics;
• (b) means for producing one or more sensor signals based on the sensed one or more characteristics;
• (c) means for converting and/or processing the one or more sensor signals to produce one or more controller-output signals;
• and
• (d) means for controlling the device based on the one or more controller-output signals.