Tubes Pneumatiques - Rorpost - Potrubni Posta - Pneumatica

The sound of a pneumatic tube system

Soundrecording of a pneumatic tube divider changing position

An electric motor turns the pipe in the divider to another output. This way a carrier can exchange tubes.

The sound of a carrier exchanging tubes through a divider

At first you hear the divider turn to the right tube, the blower starts sucking the carrier towards the divider.
The carrier passes the divider and the blower stops for a moment.
The divider turns to another tube and the blower blows the carrier into that pipe of the transfer zone.
In the end the pipe in the divider turns back to its original position.

The sound of a carrier arriving at a station, and another one leaving

Soundrecording in the engine room

Just a recording of the sound in the pneumatice tube engine room. You hear blowers blowing and sucking, relays clicking, dividers turning and carriers passing by.